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high 7.8

CVE-2026-46243 json

smb: client: reject userspace cifs.spnego descriptions

published 5mo ago modified 25d ago also EUVD-2026-33668

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits
0
none known

Summary

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

smb: client: reject userspace cifs.spnego descriptions

cifs.spnego key descriptions contain authority-bearing fields such as pid, uid, creduid, and upcall_target that cifs.upcall treats as kernel-originating inputs. However, userspace can also create keys of this type through request_key(2) or add_key(2), allowing those fields to be supplied without CIFS origin.

Only accept cifs.spnego descriptions while CIFS is using its private spnego_cred to request the key.

Patch / fix

  • Linux Linux 7.1
  • Red Hat NVIDIA for RHEL 10 0:6.12.0-212.9.el10nv, 0:6.12.0-231.12.el10nv
  • Red Hat Red Hat Enterprise Linux 10 0:6.12.0-211.20.1.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:6.12.0-55.79.1.el10_0
  • Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION 0:2.6.32-754.61.1.el6
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:3.10.0-1160.153.1.el7, 0:3.10.0-1160.155.1.rt56.1307.el7
  • Red Hat Red Hat Enterprise Linux 8 0:4.18.0-553.129.1.el8_10, 0:4.18.0-553.129.1.rt7.470.el8_10
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.18.0-305.194.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:4.18.0-305.194.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:4.18.0-372.196.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:4.18.0-372.196.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:4.18.0-477.147.1.el8_8
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:4.18.0-477.147.1.el8_8
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.13.1.el9_8
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:5.14.0-284.176.1.el9_2, 0:5.14.0-284.176.1.rt14.461.el9_2
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:5.14.0-427.132.1.el9_4
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:5.14.0-570.123.1.el9_6
  • Red Hat Red Hat OpenShift Container Platform 4.12 412.86.202606251120-0
  • Red Hat Red Hat OpenShift Container Platform 4.13 413.92.202607141229-0
  • Red Hat Red Hat OpenShift Container Platform 4.14 414.92.202606231112-0
  • Red Hat Red Hat OpenShift Container Platform 4.15 415.92.202606200237-0
  • Red Hat Red Hat OpenShift Container Platform 4.16 416.94.202607021016-0
  • Red Hat Red Hat OpenShift Container Platform 4.17 417.94.202607240132-0
  • Red Hat Red Hat OpenShift Container Platform 4.18 418.94.202606250458-0
  • Red Hat Red Hat OpenShift Container Platform 4.19 4.19.9.6.202606302000-0
  • Red Hat Red Hat OpenShift Container Platform 4.20 4.20.9.6.202607010620-0
  • Red Hat Red Hat OpenShift Container Platform 4.21 4.21.9.6.202607011303-0
  • linux Debian 12 6.1.174-1
  • linux Debian 13 6.12.90-2
  • linux Debian 14 7.0.10-1

debian advisories DEBIAN-CVE-2026-46243

  • linux Ubuntu 22.04 LTS 5.15.0-185.195
  • linux Ubuntu 24.04 LTS 6.8.0-134.134
  • linux Ubuntu 25.10 6.17.0-40.40
  • linux Ubuntu 26.04 LTS 7.0.0-27.27
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1111.118
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1060.63
  • linux-aws Ubuntu 25.10 6.17.0-1019.19
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1008.8

ubuntu advisories UBUNTU-CVE-2026-46243

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 enterprise linux nvidia 10 6.12.0-231.12.el10nv
  • rv enterprise linux nvidia 10 6.12.0-231.12.el10nv
  • perf enterprise linux nvidia 10 6.12.0-231.12.el10nv
  • rtla enterprise linux nvidia 10 6.12.0-231.12.el10nv
  • kernel-64k enterprise linux nvidia 10 6.12.0-231.12.el10nv
  • kernel-core enterprise linux nvidia 10 6.12.0-231.12.el10nv
  • kernel-tools enterprise linux nvidia 10 6.12.0-231.12.el10nv
  • python3-perf enterprise linux nvidia 10 6.12.0-231.12.el10nv

red hat advisories RHSA-2026:41236RHSA-2026:33486RHSA-2026:33225RHSA-2026:33223RHSA-2026:33224RHSA-2026:33221

  • kernel-default SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Live Patching 15 SP6 +1 more 6.4.0-150600.23.130.1
  • kernel-livepatch-MICRO-6-0-RT_Update_13 Linux Micro 6.1, Linux Micro 6.0 9-1.1
  • kernel-64kb SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS, SLE High Performance Computing 15 SP5-ESPOS 5.14.21-150500.55.182.1
  • kernel-syms SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 5.14.21-150500.55.182.1
  • kernel-source SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 5.14.21-150500.55.182.1
  • kernel-default SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +3 more 5.14.21-150500.55.182.1
  • kernel-obs-build SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 5.14.21-150500.55.182.1
  • kernel-default-base SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 5.14.21-150500.55.182.1.150500.6.85.2

suse advisories SUSE-SU-2026:3602-1SUSE-SU-2026:22689-1SUSE-SU-2026:22711-1SUSE-SU-2026:3595-1SUSE-SU-2026:3810-1SUSE-SU-2026:3790-1

  • kernel-source openSUSE Tumbleweed 7.0.11-1.1

opensuse advisories openSUSE-SU-2026:10954-1

  • kernel AlmaLinux 9 5.14.0-687.13.1.el9_8
  • rv AlmaLinux 9 5.14.0-687.13.1.el9_8
  • perf AlmaLinux 9 5.14.0-687.13.1.el9_8
  • rtla AlmaLinux 9 5.14.0-687.13.1.el9_8
  • libperf AlmaLinux 9 5.14.0-687.13.1.el9_8
  • kernel-rt AlmaLinux 9 5.14.0-687.13.1.el9_8
  • kernel-64k AlmaLinux 9 5.14.0-687.13.1.el9_8
  • kernel-core AlmaLinux 9 5.14.0-687.13.1.el9_8

almalinux advisories ALSA-2026:24381ALSA-2026:23258ALSA-2026:23259ALSA-2026:23329

  • kernel-rt Rocky Linux 8 4.18.0-553.129.1.rt7.470.el8_10
  • kernel Rocky Linux 8 4.18.0-553.129.1.el8_10

rocky linux advisories RLSA-2026:23259RLSA-2026:23258

  • kernel Azure Linux 3.0 6.6.143.1-1

azure linux advisories AZL-89309

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

Is CVE-2026-46243 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

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

cisa ICSA-26-295-16 updated cvss 7.1

Siemens SIMATIC S7-1500 TM MFP

  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
    affected: mitigation, no fix available

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

red hat product security vex CVE-2026-46243 updated cvss 7.8

kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions

  • Red Hat NVIDIA for RHEL 10 rv 6.12.0-212.9.el10nv, rv 6.12.0-231.12.el10nv, perf 6.12.0-212.9.el10nv, rtla 6.12.0-212.9.el10nv, perf 6.12.0-231.12.el10nv, rtla 6.12.0-231.12.el10nv, +56 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:23395
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.123.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.123.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.123.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.123.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.123.1.el9_6
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:27708
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.13.1.el9_8, perf 5.14.0-687.13.1.el9_8, rtla 5.14.0-687.13.1.el9_8, python3-perf 5.14.0-687.13.1.el9_8, kernel-devel-matched 5.14.0-687.13.1.el9_8, kernel-64k-devel-matched 5.14.0-687.13.1.el9_8, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:24381
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.20.1.el10_2, perf 6.12.0-211.20.1.el10_2, rtla 6.12.0-211.20.1.el10_2, python3-perf 6.12.0-211.20.1.el10_2, kernel-devel-matched 6.12.0-211.20.1.el10_2, kernel-64k-devel-matched 6.12.0-211.20.1.el10_2, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:23329
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.176.1.el9_2, rtla 5.14.0-284.176.1.el9_2, kernel-devel-matched 5.14.0-284.176.1.el9_2, kernel-64k-devel-matched 5.14.0-284.176.1.el9_2, kernel-debug-devel-matched 5.14.0-284.176.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.176.1.el9_2, +5 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:26515
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.132.1.el9_4, perf 5.14.0-427.132.1.el9_4, rtla 5.14.0-427.132.1.el9_4, kernel-devel-matched 5.14.0-427.132.1.el9_4, kernel-64k-devel-matched 5.14.0-427.132.1.el9_4, kernel-debug-devel-matched 5.14.0-427.132.1.el9_4, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:27735
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.79.1.el10_0, perf 6.12.0-55.79.1.el10_0, rtla 6.12.0-55.79.1.el10_0, python3-perf 6.12.0-55.79.1.el10_0, kernel-devel-matched 6.12.0-55.79.1.el10_0, kernel-64k-devel-matched 6.12.0-55.79.1.el10_0, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:25908
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.123.1.el9_6, perf 5.14.0-570.123.1.el9_6, rtla 5.14.0-570.123.1.el9_6, python3-perf 5.14.0-570.123.1.el9_6, kernel-devel-matched 5.14.0-570.123.1.el9_6, kernel-64k-devel-matched 5.14.0-570.123.1.el9_6, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:27708
show 32 more
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.129.1.el8_10, kernel 4.18.0-553.129.1.el8_10, bpftool 4.18.0-553.129.1.el8_10, kernel-core 4.18.0-553.129.1.el8_10, kernel-tools 4.18.0-553.129.1.el8_10, python3-perf 4.18.0-553.129.1.el8_10, +20 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:23258
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.13.1.el9_8, kernel-64k 5.14.0-687.13.1.el9_8, kernel-core 5.14.0-687.13.1.el9_8, kernel-tools 5.14.0-687.13.1.el9_8, kernel-modules 5.14.0-687.13.1.el9_8, kernel-64k-core 5.14.0-687.13.1.el9_8, +28 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:24381
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.20.1.el10_2, kernel-64k 6.12.0-211.20.1.el10_2, kernel-core 6.12.0-211.20.1.el10_2, kernel-tools 6.12.0-211.20.1.el10_2, kernel-modules 6.12.0-211.20.1.el10_2, kernel-64k-core 6.12.0-211.20.1.el10_2, +29 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:23329
  • 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 “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:26535
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.196.1.el8_6, kernel 4.18.0-372.196.1.el8_6, bpftool 4.18.0-372.196.1.el8_6, kernel-core 4.18.0-372.196.1.el8_6, kernel-tools 4.18.0-372.196.1.el8_6, python3-perf 4.18.0-372.196.1.el8_6, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:26570
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.147.1.el8_8, kernel 4.18.0-477.147.1.el8_8, bpftool 4.18.0-477.147.1.el8_8, kernel-core 4.18.0-477.147.1.el8_8, kernel-tools 4.18.0-477.147.1.el8_8, python3-perf 4.18.0-477.147.1.el8_8, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:26563
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.176.1.el9_2, kernel 5.14.0-284.176.1.el9_2, kernel-64k 5.14.0-284.176.1.el9_2, kernel-core 5.14.0-284.176.1.el9_2, kernel-tools 5.14.0-284.176.1.el9_2, python3-perf 5.14.0-284.176.1.el9_2, +33 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:26515
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.132.1.el9_4, kernel 5.14.0-427.132.1.el9_4, kernel-64k 5.14.0-427.132.1.el9_4, kernel-core 5.14.0-427.132.1.el9_4, kernel-tools 5.14.0-427.132.1.el9_4, python3-perf 5.14.0-427.132.1.el9_4, +33 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:27735
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.79.1.el10_0, kernel-64k 6.12.0-55.79.1.el10_0, kernel-core 6.12.0-55.79.1.el10_0, kernel-tools 6.12.0-55.79.1.el10_0, kernel-modules 6.12.0-55.79.1.el10_0, kernel-64k-core 6.12.0-55.79.1.el10_0, +27 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:25908
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.123.1.el9_6, kernel-64k 5.14.0-570.123.1.el9_6, kernel-core 5.14.0-570.123.1.el9_6, kernel-tools 5.14.0-570.123.1.el9_6, kernel-modules 5.14.0-570.123.1.el9_6, kernel-64k-core 5.14.0-570.123.1.el9_6, +32 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:27708
  • 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 “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:26535
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.196.1.el8_6, kernel 4.18.0-372.196.1.el8_6, bpftool 4.18.0-372.196.1.el8_6, kernel-core 4.18.0-372.196.1.el8_6, kernel-tools 4.18.0-372.196.1.el8_6, python3-perf 4.18.0-372.196.1.el8_6, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:26570
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.147.1.el8_8, kernel 4.18.0-477.147.1.el8_8, bpftool 4.18.0-477.147.1.el8_8, kernel-core 4.18.0-477.147.1.el8_8, kernel-tools 4.18.0-477.147.1.el8_8, python3-perf 4.18.0-477.147.1.el8_8, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:26563
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.13.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.13.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.13.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.13.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.13.1.el9_8
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:24381
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.20.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.20.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.20.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.20.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.20.1.el10_2
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:23329
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.79.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.79.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.79.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.79.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.79.1.el10_0
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:25908
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.129.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.129.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.129.1.el8_10
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:23258
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.155.1.rt56.1307.el7, kernel-rt-trace 3.10.0-1160.155.1.rt56.1307.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.155.1.rt56.1307.el7
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:41236
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.129.1.rt7.470.el8_10, kernel-rt-kvm 4.18.0-553.129.1.rt7.470.el8_10, kernel-rt-core 4.18.0-553.129.1.rt7.470.el8_10, kernel-rt-modules 4.18.0-553.129.1.rt7.470.el8_10, kernel-rt-debug-kvm 4.18.0-553.129.1.rt7.470.el8_10, kernel-rt-debug-core 4.18.0-553.129.1.rt7.470.el8_10, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:23259
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.13.1.el9_8, kernel-rt-64k 5.14.0-687.13.1.el9_8, kernel-rt-core 5.14.0-687.13.1.el9_8, kernel-rt-modules 5.14.0-687.13.1.el9_8, kernel-rt-64k-core 5.14.0-687.13.1.el9_8, kernel-rt-debug-core 5.14.0-687.13.1.el9_8, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:24381
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.20.1.el10_2, kernel-rt-64k 6.12.0-211.20.1.el10_2, kernel-rt-core 6.12.0-211.20.1.el10_2, kernel-rt-modules 6.12.0-211.20.1.el10_2, kernel-rt-64k-core 6.12.0-211.20.1.el10_2, kernel-rt-debug-core 6.12.0-211.20.1.el10_2, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:23329
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-core 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-modules 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-debug-core 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-modules-core 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-debug-modules 5.14.0-284.176.1.rt14.461.el9_2, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:26462
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.132.1.el9_4, kernel-rt-core 5.14.0-427.132.1.el9_4, kernel-rt-modules 5.14.0-427.132.1.el9_4, kernel-rt-debug-core 5.14.0-427.132.1.el9_4, kernel-rt-modules-core 5.14.0-427.132.1.el9_4, kernel-rt-debug-modules 5.14.0-427.132.1.el9_4, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:27735
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.79.1.el10_0, kernel-rt-64k 6.12.0-55.79.1.el10_0, kernel-rt-core 6.12.0-55.79.1.el10_0, kernel-rt-modules 6.12.0-55.79.1.el10_0, kernel-rt-64k-core 6.12.0-55.79.1.el10_0, kernel-rt-debug-core 6.12.0-55.79.1.el10_0, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:25908
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.123.1.el9_6, kernel-rt-64k 5.14.0-570.123.1.el9_6, kernel-rt-core 5.14.0-570.123.1.el9_6, kernel-rt-modules 5.14.0-570.123.1.el9_6, kernel-rt-64k-core 5.14.0-570.123.1.el9_6, kernel-rt-debug-core 5.14.0-570.123.1.el9_6, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:27708
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.13.1.el9_8, kernel-rt-core 5.14.0-687.13.1.el9_8, kernel-rt-modules 5.14.0-687.13.1.el9_8, kernel-rt-debug-core 5.14.0-687.13.1.el9_8, kernel-rt-modules-core 5.14.0-687.13.1.el9_8, kernel-rt-debug-modules 5.14.0-687.13.1.el9_8, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:24381
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.20.1.el10_2, kernel-rt-core 6.12.0-211.20.1.el10_2, kernel-rt-modules 6.12.0-211.20.1.el10_2, kernel-rt-debug-core 6.12.0-211.20.1.el10_2, kernel-rt-modules-core 6.12.0-211.20.1.el10_2, kernel-rt-debug-modules 6.12.0-211.20.1.el10_2, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:23329
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-kvm 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-core 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-modules 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-debug-kvm 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-debug-core 5.14.0-284.176.1.rt14.461.el9_2, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:26462
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.132.1.el9_4, kernel-rt-kvm 5.14.0-427.132.1.el9_4, kernel-rt-core 5.14.0-427.132.1.el9_4, kernel-rt-modules 5.14.0-427.132.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.132.1.el9_4, kernel-rt-debug-core 5.14.0-427.132.1.el9_4, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:27735
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.79.1.el10_0, kernel-rt-kvm 6.12.0-55.79.1.el10_0, kernel-rt-core 6.12.0-55.79.1.el10_0, kernel-rt-modules 6.12.0-55.79.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.79.1.el10_0, kernel-rt-debug-core 6.12.0-55.79.1.el10_0, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:25908
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.123.1.el9_6, kernel-rt-kvm 5.14.0-570.123.1.el9_6, kernel-rt-core 5.14.0-570.123.1.el9_6, kernel-rt-modules 5.14.0-570.123.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.123.1.el9_6, kernel-rt-debug-core 5.14.0-570.123.1.el9_6, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:27708
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.129.1.rt7.470.el8_10, kernel-rt-core 4.18.0-553.129.1.rt7.470.el8_10, kernel-rt-modules 4.18.0-553.129.1.rt7.470.el8_10, kernel-rt-debug-core 4.18.0-553.129.1.rt7.470.el8_10, kernel-rt-debug-modules 4.18.0-553.129.1.rt7.470.el8_10, kernel-rt-modules-extra 4.18.0-553.129.1.rt7.470.el8_10, +2 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:23259

14 more fixed 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
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
5mo ago

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/manizada/CIFSwitch referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 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
  • Red Hat NVIDIA for RHEL 10
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat OpenShift Container Platform 4.12
  • Red Hat Red Hat OpenShift Container Platform 4.13
  • Red Hat Red Hat OpenShift Container Platform 4.14
  • Red Hat Red Hat OpenShift Container Platform 4.15
  • Red Hat Red Hat OpenShift Container Platform 4.16
  • Red Hat Red Hat OpenShift Container Platform 4.17
  • Red Hat Red Hat OpenShift Container Platform 4.18
  • Red Hat Red Hat OpenShift Container Platform 4.19
  • Red Hat Red Hat OpenShift Container Platform 4.20
  • Red Hat Red Hat OpenShift Container Platform 4.21
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-825 Expired Pointer Dereference
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.