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high 7.8

CVE-2026-23001 json

macvlan: fix possible UAF in macvlan_forward_source()

published 9mo ago modified 21d ago also EUVD-2026-4615

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

macvlan: fix possible UAF in macvlan_forward_source()

Add RCU protection on (struct macvlan_source_entry)->vlan.

Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts.

This allows macvlan_forward_source() to skip over entries queued for freeing.

Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)).

https: //lore.kernel.org/netdev/695fb1e8.050a0220.1c677c.039f.GAE@google.com/T/#u

Patch / fix

  • Linux Linux 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.67, 6.18.7, 6.19
  • linux Debian 12 6.1.162-1
  • linux Debian 13 6.12.69-1
  • linux Debian 14 6.18.8-1

debian advisories DEBIAN-CVE-2026-23001

  • linux Ubuntu 22.04 LTS 5.15.0-176.186
  • linux Ubuntu 24.04 LTS 6.8.0-117.117
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1105.112
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1055.58
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1105.114
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1058.61
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1101.107
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1054.60

ubuntu advisories UBUNTU-CVE-2026-23001

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 10.1 6.12.0-124.43.1.el10_1
  • rv RHEL 10.1 6.12.0-124.43.1.el10_1
  • perf RHEL 10.1 6.12.0-124.43.1.el10_1
  • rtla RHEL 10.1 6.12.0-124.43.1.el10_1
  • libperf RHEL 10.1 6.12.0-124.43.1.el10_1
  • kernel-rt RHEL 10.1 6.12.0-124.43.1.el10_1
  • kernel-64k RHEL 10.1 6.12.0-124.43.1.el10_1
  • kernel-core RHEL 10.1 6.12.0-124.43.1.el10_1

red hat advisories RHSA-2026:26535RHSA-2026:25533RHSA-2026:10996RHSA-2026:9836RHSA-2026:9835RHSA-2026:6986

  • kernel-rt SLE Micro 5.4, SLE Micro 5.3 5.14.21-150400.15.145.1
  • kernel-source-rt SLE Micro 5.4, SLE Micro 5.3 5.14.21-150400.15.145.1
  • kernel-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-40.1
  • kernel-source-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-40.1
  • kernel-rt Linux Micro 6.2 6.12.0-160000.26.1
  • kernel-64kb SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.26.1
  • kernel-source SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.26.1
  • kernel-default SLES 16.0, SLE High Availability Extension 16.0, Linux Micro 6.2 +1 more 6.12.0-160000.26.1

suse advisories SUSE-SU-2026:1131-1SUSE-SU-2026:20845-1SUSE-SU-2026:20876-1SUSE-SU-2026:20555-1SUSE-SU-2026:20599-1SUSE-SU-2026:20615-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.26.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.26.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.26.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.26.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.26.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.26.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.26.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.26.1

opensuse advisories openSUSE-SU-2026:20287-1

  • kernel AlmaLinux 8 4.18.0-553.111.1.el8_10
  • perf AlmaLinux 8 4.18.0-553.111.1.el8_10
  • bpftool AlmaLinux 8 4.18.0-553.111.1.el8_10
  • kernel-core AlmaLinux 8 4.18.0-553.111.1.el8_10
  • kernel-tools AlmaLinux 8 4.18.0-553.111.1.el8_10
  • python3-perf AlmaLinux 8 4.18.0-553.111.1.el8_10
  • kernel-modules AlmaLinux 8 4.18.0-553.111.1.el8_10
  • kernel-zfcpdump AlmaLinux 8 4.18.0-553.111.1.el8_10

almalinux advisories ALSA-2026:3963ALSA-2026:3964ALSA-2026:3966ALSA-2026:4012

  • kernel-rt Rocky Linux 8 4.18.0-553.111.1.rt7.452.el8_10
  • kernel Rocky Linux 8 4.18.0-553.111.1.el8_10

rocky linux advisories RLSA-2026:3964RLSA-2026:3963

  • kernel Azure Linux 3.0 6.6.126.1-1

azure linux advisories AZL-77169

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-23001 updated cvss 7.8

kernel: macvlan: fix possible UAF in macvlan_forward_source()

  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: workaround, no fix available “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.”
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.117.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.117.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.117.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.117.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.117.1.el9_4
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:6310
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.100.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.100.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.100.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.100.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.100.1.el9_6
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:5197
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.38.1.el9_7, perf 5.14.0-611.38.1.el9_7, rtla 5.14.0-611.38.1.el9_7, python3-perf 5.14.0-611.38.1.el9_7, kernel-devel-matched 5.14.0-611.38.1.el9_7, kernel-64k-devel-matched 5.14.0-611.38.1.el9_7, +7 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:3966
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-124.43.1.el10_1, perf 6.12.0-124.43.1.el10_1, rtla 6.12.0-124.43.1.el10_1, python3-perf 6.12.0-124.43.1.el10_1, kernel-devel-matched 6.12.0-124.43.1.el10_1, kernel-64k-devel-matched 6.12.0-124.43.1.el10_1, +7 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:4012
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.175.1.el9_0, kernel-devel-matched 5.14.0-70.175.1.el9_0, kernel-debug-devel-matched 5.14.0-70.175.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.175.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.175.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.175.1.el9_0, +2 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:9836
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.164.1.el9_2, rtla 5.14.0-284.164.1.el9_2, kernel-devel-matched 5.14.0-284.164.1.el9_2, kernel-64k-devel-matched 5.14.0-284.164.1.el9_2, kernel-debug-devel-matched 5.14.0-284.164.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.164.1.el9_2, +5 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:6986
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.70.1.el10_0, perf 6.12.0-55.70.1.el10_0, rtla 6.12.0-55.70.1.el10_0, python3-perf 6.12.0-55.70.1.el10_0, kernel-devel-matched 6.12.0-55.70.1.el10_0, kernel-64k-devel-matched 6.12.0-55.70.1.el10_0, +7 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:10996
show 32 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.117.1.el9_4, perf 5.14.0-427.117.1.el9_4, rtla 5.14.0-427.117.1.el9_4, kernel-devel-matched 5.14.0-427.117.1.el9_4, kernel-64k-devel-matched 5.14.0-427.117.1.el9_4, kernel-debug-devel-matched 5.14.0-427.117.1.el9_4, +6 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:6310
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.100.1.el9_6, perf 5.14.0-570.100.1.el9_6, rtla 5.14.0-570.100.1.el9_6, python3-perf 5.14.0-570.100.1.el9_6, kernel-devel-matched 5.14.0-570.100.1.el9_6, kernel-64k-devel-matched 5.14.0-570.100.1.el9_6, +7 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:5197
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.111.1.el8_10, kernel 4.18.0-553.111.1.el8_10, bpftool 4.18.0-553.111.1.el8_10, kernel-core 4.18.0-553.111.1.el8_10, kernel-tools 4.18.0-553.111.1.el8_10, python3-perf 4.18.0-553.111.1.el8_10, +15 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:3963
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.38.1.el9_7, kernel-64k 5.14.0-611.38.1.el9_7, kernel-core 5.14.0-611.38.1.el9_7, kernel-tools 5.14.0-611.38.1.el9_7, kernel-modules 5.14.0-611.38.1.el9_7, kernel-64k-core 5.14.0-611.38.1.el9_7, +27 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:3966
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-124.43.1.el10_1, kernel-64k 6.12.0-124.43.1.el10_1, kernel-core 6.12.0-124.43.1.el10_1, kernel-tools 6.12.0-124.43.1.el10_1, kernel-modules 6.12.0-124.43.1.el10_1, kernel-64k-core 6.12.0-124.43.1.el10_1, +28 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:4012
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.194.1.el8_4, kernel 4.18.0-305.194.1.el8_4, bpftool 4.18.0-305.194.1.el8_4, kernel-core 4.18.0-305.194.1.el8_4, kernel-tools 4.18.0-305.194.1.el8_4, python3-perf 4.18.0-305.194.1.el8_4, +8 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:26535
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.195.1.el8_6, kernel 4.18.0-372.195.1.el8_6, bpftool 4.18.0-372.195.1.el8_6, kernel-core 4.18.0-372.195.1.el8_6, kernel-tools 4.18.0-372.195.1.el8_6, python3-perf 4.18.0-372.195.1.el8_6, +8 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:25533
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.135.1.el8_8, kernel 4.18.0-477.135.1.el8_8, bpftool 4.18.0-477.135.1.el8_8, kernel-core 4.18.0-477.135.1.el8_8, kernel-tools 4.18.0-477.135.1.el8_8, python3-perf 4.18.0-477.135.1.el8_8, +9 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:6954
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.175.1.el9_0, bpftool 5.14.0-70.175.1.el9_0, kernel-core 5.14.0-70.175.1.el9_0, kernel-tools 5.14.0-70.175.1.el9_0, python3-perf 5.14.0-70.175.1.el9_0, kernel-modules 5.14.0-70.175.1.el9_0, +14 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:9836
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.164.1.el9_2, kernel 5.14.0-284.164.1.el9_2, kernel-64k 5.14.0-284.164.1.el9_2, kernel-core 5.14.0-284.164.1.el9_2, kernel-tools 5.14.0-284.164.1.el9_2, python3-perf 5.14.0-284.164.1.el9_2, +28 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:6986
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.70.1.el10_0, kernel-64k 6.12.0-55.70.1.el10_0, kernel-core 6.12.0-55.70.1.el10_0, kernel-tools 6.12.0-55.70.1.el10_0, kernel-modules 6.12.0-55.70.1.el10_0, kernel-64k-core 6.12.0-55.70.1.el10_0, +27 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:10996
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.117.1.el9_4, kernel 5.14.0-427.117.1.el9_4, kernel-64k 5.14.0-427.117.1.el9_4, kernel-core 5.14.0-427.117.1.el9_4, kernel-tools 5.14.0-427.117.1.el9_4, python3-perf 5.14.0-427.117.1.el9_4, +28 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:6310
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.100.1.el9_6, kernel-64k 5.14.0-570.100.1.el9_6, kernel-core 5.14.0-570.100.1.el9_6, kernel-tools 5.14.0-570.100.1.el9_6, kernel-modules 5.14.0-570.100.1.el9_6, kernel-64k-core 5.14.0-570.100.1.el9_6, +27 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:5197
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.194.1.el8_4, kernel 4.18.0-305.194.1.el8_4, bpftool 4.18.0-305.194.1.el8_4, kernel-core 4.18.0-305.194.1.el8_4, kernel-tools 4.18.0-305.194.1.el8_4, python3-perf 4.18.0-305.194.1.el8_4, +8 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:26535
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.195.1.el8_6, kernel 4.18.0-372.195.1.el8_6, bpftool 4.18.0-372.195.1.el8_6, kernel-core 4.18.0-372.195.1.el8_6, kernel-tools 4.18.0-372.195.1.el8_6, python3-perf 4.18.0-372.195.1.el8_6, +8 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:25533
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.135.1.el8_8, kernel 4.18.0-477.135.1.el8_8, bpftool 4.18.0-477.135.1.el8_8, kernel-core 4.18.0-477.135.1.el8_8, kernel-tools 4.18.0-477.135.1.el8_8, python3-perf 4.18.0-477.135.1.el8_8, +8 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:6954
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-611.38.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-611.38.1.el9_7, kernel-debuginfo-common-x86_64 5.14.0-611.38.1.el9_7, kernel-debuginfo-common-aarch64 5.14.0-611.38.1.el9_7, kernel-debuginfo-common-ppc64le 5.14.0-611.38.1.el9_7
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:3966
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-124.43.1.el10_1, kernel-debuginfo-common-s390x 6.12.0-124.43.1.el10_1, kernel-debuginfo-common-x86_64 6.12.0-124.43.1.el10_1, kernel-debuginfo-common-aarch64 6.12.0-124.43.1.el10_1, kernel-debuginfo-common-ppc64le 6.12.0-124.43.1.el10_1
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:4012
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.70.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.70.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.70.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.70.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.70.1.el10_0
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:10996
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.111.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.111.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.111.1.el8_10
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:3963
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.111.1.rt7.452.el8_10, kernel-rt-kvm 4.18.0-553.111.1.rt7.452.el8_10, kernel-rt-core 4.18.0-553.111.1.rt7.452.el8_10, kernel-rt-modules 4.18.0-553.111.1.rt7.452.el8_10, kernel-rt-debug-kvm 4.18.0-553.111.1.rt7.452.el8_10, kernel-rt-debug-core 4.18.0-553.111.1.rt7.452.el8_10, +4 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:3964
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-kvm 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-core 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-modules 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-debug-kvm 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-debug-core 5.14.0-70.175.1.rt21.247.el9_0, +4 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:9835
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-611.38.1.el9_7, kernel-rt-64k 5.14.0-611.38.1.el9_7, kernel-rt-core 5.14.0-611.38.1.el9_7, kernel-rt-modules 5.14.0-611.38.1.el9_7, kernel-rt-64k-core 5.14.0-611.38.1.el9_7, kernel-rt-debug-core 5.14.0-611.38.1.el9_7, +14 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:3966
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-124.43.1.el10_1, kernel-rt-64k 6.12.0-124.43.1.el10_1, kernel-rt-core 6.12.0-124.43.1.el10_1, kernel-rt-modules 6.12.0-124.43.1.el10_1, kernel-rt-64k-core 6.12.0-124.43.1.el10_1, kernel-rt-debug-core 6.12.0-124.43.1.el10_1, +14 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:4012
  • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-core 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-modules 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-debug-core 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-debug-modules 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-modules-extra 5.14.0-70.175.1.rt21.247.el9_0, +2 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:9835
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-core 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-modules 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-debug-core 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-modules-core 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-debug-modules 5.14.0-284.164.1.rt14.449.el9_2, +4 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:6948
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.70.1.el10_0, kernel-rt-64k 6.12.0-55.70.1.el10_0, kernel-rt-core 6.12.0-55.70.1.el10_0, kernel-rt-modules 6.12.0-55.70.1.el10_0, kernel-rt-64k-core 6.12.0-55.70.1.el10_0, kernel-rt-debug-core 6.12.0-55.70.1.el10_0, +14 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:10996
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.117.1.el9_4, kernel-rt-core 5.14.0-427.117.1.el9_4, kernel-rt-modules 5.14.0-427.117.1.el9_4, kernel-rt-debug-core 5.14.0-427.117.1.el9_4, kernel-rt-modules-core 5.14.0-427.117.1.el9_4, kernel-rt-debug-modules 5.14.0-427.117.1.el9_4, +4 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:6310
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.100.1.el9_6, kernel-rt-64k 5.14.0-570.100.1.el9_6, kernel-rt-core 5.14.0-570.100.1.el9_6, kernel-rt-modules 5.14.0-570.100.1.el9_6, kernel-rt-64k-core 5.14.0-570.100.1.el9_6, kernel-rt-debug-core 5.14.0-570.100.1.el9_6, +14 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:5197
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-611.38.1.el9_7, kernel-rt-core 5.14.0-611.38.1.el9_7, kernel-rt-modules 5.14.0-611.38.1.el9_7, kernel-rt-debug-core 5.14.0-611.38.1.el9_7, kernel-rt-modules-core 5.14.0-611.38.1.el9_7, kernel-rt-debug-modules 5.14.0-611.38.1.el9_7, +4 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:3966
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-124.43.1.el10_1, kernel-rt-core 6.12.0-124.43.1.el10_1, kernel-rt-modules 6.12.0-124.43.1.el10_1, kernel-rt-debug-core 6.12.0-124.43.1.el10_1, kernel-rt-modules-core 6.12.0-124.43.1.el10_1, kernel-rt-debug-modules 6.12.0-124.43.1.el10_1, +4 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:4012
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-kvm 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-core 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-modules 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-debug-kvm 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-debug-core 5.14.0-284.164.1.rt14.449.el9_2, +6 more
    fixed: vendor fix “To mitigate this issue, prevent module macvlan from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:6948

4 more fixed, 2 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4mo ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.