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Fencer Vulns
critical 9.8

CVE-2026-43037 in the critical feed json

ip6_tunnel: clear skb2->cb[] in ip4ip6_err()

published 2026-05-01 6 mo ago modified 2026-10-19 20 d ago also EUVD-2026-26636

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

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

ip6_tunnel: clear skb2->cb[] in ip4ip6_err()

Oskar Kjos reported the following problem.

ip4ip6_err() calls icmp_send() on a cloned skb whose cb[] was written by the IPv6 receive path as struct inet6_skb_parm. icmp_send() passes IPCB(skb2) to __ip_options_echo(), which interprets that cb[] region as struct inet_skb_parm (IPv4). The layouts differ: inet6_skb_parm.nhoff at offset 14 overlaps inet_skb_parm.opt.rr, producing a non-zero rr value. __ip_options_echo() then reads optlen from attacker-controlled packet data at sptr[rr+1] and copies that many bytes into dopt->__data, a fixed 40-byte stack buffer (IP_OPTIONS_DATA_FIXED_SIZE).

To fix this we clear skb2->cb[], as suggested by Oskar Kjos.

Also add minimal IPv4 header validation (version == 4, ihl >= 5).

Patch / fix

  • Linux Linux 5.10.253, 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12, 7.0
  • Red Hat NVIDIA for RHEL 10 0:6.12.0-212.10.el10nv, 0:6.12.0-231.12.el10nv
  • Red Hat Red Hat Enterprise Linux 10 0:6.12.0-211.22.1.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:6.12.0-55.77.1.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 0:4.18.0-553.132.1.el8_10, 0:4.18.0-553.132.1.rt7.473.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 0:4.18.0-372.195.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:4.18.0-372.195.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:4.18.0-477.145.1.el8_8
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:4.18.0-477.145.1.el8_8
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.15.1.el9_8
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:5.14.0-284.174.1.el9_2, 0:5.14.0-284.174.1.rt14.459.el9_2
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:5.14.0-427.129.1.el9_4
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:5.14.0-570.119.1.el9_6
  • Red Hat Red Hat OpenShift Container Platform 4.12 412.86.202606140301-0
  • Red Hat Red Hat OpenShift Container Platform 4.13 413.92.202606160406-0
  • 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 4.16 416.94.202606051757-0
  • Red Hat Red Hat OpenShift Container Platform 4.17 417.94.202606250942-0
  • Red Hat Red Hat OpenShift Container Platform 4.18 418.94.202606051320-0
  • Red Hat Red Hat OpenShift Container Platform 4.19 4.19.9.6.202606100451-0
  • Red Hat Red Hat OpenShift Container Platform 4.20 4.20.9.6.202606101223-0
  • Red Hat Red Hat OpenShift Container Platform 4.21 4.21.9.6.202606101139-0
  • Red Hat Red Hat OpenShift Container Platform 4.22 4.22.9.8.202607220526-0
  • linux Debian 12 6.1.170-1
  • linux Debian 13 6.12.85-1
  • linux Debian 14 6.19.12-1

debian advisories DEBIAN-CVE-2026-43037

  • 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-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-gcp Ubuntu 22.04 LTS 5.15.0-1111.121
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1063.69

ubuntu advisories UBUNTU-CVE-2026-43037

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-2026:28750RHSA-2026:28749RHSA-2026:28742RHSA-2026:28748

  • kernel-livepatch-MICRO-6-0-RT_Update_13 Linux Micro 6.1, Linux Micro 6.0 9-1.1
  • kernel-livepatch-SLE16_Update_11 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 4-160000.1.1
  • kernel-livepatch-SLE16_Update_8 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 5-160000.1.1
  • kernel-livepatch-SLE16_Update_2 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 11-160000.1.1
  • kernel-livepatch-SLE16_Update_6 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 7-160000.1.1
  • kernel-livepatch-SLE16_Update_5 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 8-160000.1.1
  • kernel-livepatch-SLE16_Update_0 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 15-160000.4.3
  • kernel-livepatch-MICRO-6-0-RT_Update_10 Linux Micro 6.1, Linux Micro 6.0 18-1.1

suse advisories SUSE-SU-2026:22689-1SUSE-SU-2026:22711-1SUSE-SU-2026:22763-1SUSE-SU-2026:22877-1SUSE-SU-2026:22762-1SUSE-SU-2026:22875-1

  • kernel AlmaLinux 10 6.12.0-211.22.1.el10_2
  • rv AlmaLinux 10 6.12.0-211.22.1.el10_2
  • perf AlmaLinux 10 6.12.0-211.22.1.el10_2
  • rtla AlmaLinux 10 6.12.0-211.22.1.el10_2
  • libperf AlmaLinux 10 6.12.0-211.22.1.el10_2
  • kernel-rt AlmaLinux 10 6.12.0-211.22.1.el10_2
  • kernel-64k AlmaLinux 10 6.12.0-211.22.1.el10_2
  • kernel-core AlmaLinux 10 6.12.0-211.22.1.el10_2

almalinux advisories ALSA-2026:25191ALSA-2026:25217ALSA-2026:25120ALSA-2026:25121

  • kernel Rocky Linux 9 5.14.0-687.15.1.el9_7.cloud.1.0
  • kernel Rocky Linux 8 4.18.0-553.132.1.el8_10.cloud.0.1
  • kernel Rocky Linux 10 6.12.0-211.22.1.el10_2
  • kernel Rocky Linux 9 5.14.0-687.15.1.el9_8
  • kernel-rt Rocky Linux 8 4.18.0-553.132.1.rt7.473.el8_10
  • kernel Rocky Linux 8 4.18.0-553.132.1.el8_10

rocky linux advisories RXSA-2026:25217RXSA-2026:25121RLSA-2026:25191RLSA-2026:25217RLSA-2026:25120RLSA-2026:25121

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-2026-43037 updated cvss 8.8

kernel: ip6_tunnel: clear skb2->cb[] in ip4ip6_err()

  • 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 “Fix deferred”
  • Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, no fix available
  • Red Hat NVIDIA for RHEL 10 rv 6.12.0-212.10.el10nv, rv 6.12.0-231.12.el10nv, perf 6.12.0-212.10.el10nv, perf 6.12.0-231.12.el10nv, rtla 6.12.0-212.10.el10nv, rtla 6.12.0-231.12.el10nv, +56 more
    fixed: vendor fix RHSA-2026:25534
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.119.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.119.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.119.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.119.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.119.1.el9_6
    fixed: vendor fix RHSA-2026:23224
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.15.1.el9_8, perf 5.14.0-687.15.1.el9_8, rtla 5.14.0-687.15.1.el9_8, python3-perf 5.14.0-687.15.1.el9_8, kernel-devel-matched 5.14.0-687.15.1.el9_8, kernel-64k-devel-matched 5.14.0-687.15.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.22.1.el10_2, perf 6.12.0-211.22.1.el10_2, rtla 6.12.0-211.22.1.el10_2, python3-perf 6.12.0-211.22.1.el10_2, kernel-devel-matched 6.12.0-211.22.1.el10_2, kernel-64k-devel-matched 6.12.0-211.22.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:25191
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.174.1.el9_2, rtla 5.14.0-284.174.1.el9_2, kernel-devel-matched 5.14.0-284.174.1.el9_2, kernel-64k-devel-matched 5.14.0-284.174.1.el9_2, kernel-debug-devel-matched 5.14.0-284.174.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.174.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:22940
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.129.1.el9_4, perf 5.14.0-427.129.1.el9_4, rtla 5.14.0-427.129.1.el9_4, kernel-devel-matched 5.14.0-427.129.1.el9_4, kernel-64k-devel-matched 5.14.0-427.129.1.el9_4, kernel-debug-devel-matched 5.14.0-427.129.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:23237
show 32 more
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.77.1.el10_0, perf 6.12.0-55.77.1.el10_0, rtla 6.12.0-55.77.1.el10_0, python3-perf 6.12.0-55.77.1.el10_0, kernel-devel-matched 6.12.0-55.77.1.el10_0, kernel-64k-devel-matched 6.12.0-55.77.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:24343
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.119.1.el9_6, perf 5.14.0-570.119.1.el9_6, rtla 5.14.0-570.119.1.el9_6, python3-perf 5.14.0-570.119.1.el9_6, kernel-devel-matched 5.14.0-570.119.1.el9_6, kernel-64k-devel-matched 5.14.0-570.119.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:23224
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.132.1.el8_10, kernel 4.18.0-553.132.1.el8_10, bpftool 4.18.0-553.132.1.el8_10, kernel-core 4.18.0-553.132.1.el8_10, kernel-tools 4.18.0-553.132.1.el8_10, python3-perf 4.18.0-553.132.1.el8_10, +20 more
    fixed: vendor fix RHSA-2026:25121
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.15.1.el9_8, kernel-64k 5.14.0-687.15.1.el9_8, kernel-core 5.14.0-687.15.1.el9_8, kernel-tools 5.14.0-687.15.1.el9_8, kernel-modules 5.14.0-687.15.1.el9_8, kernel-64k-core 5.14.0-687.15.1.el9_8, +28 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.22.1.el10_2, kernel-64k 6.12.0-211.22.1.el10_2, kernel-core 6.12.0-211.22.1.el10_2, kernel-tools 6.12.0-211.22.1.el10_2, kernel-modules 6.12.0-211.22.1.el10_2, kernel-64k-core 6.12.0-211.22.1.el10_2, +29 more
    fixed: vendor fix RHSA-2026:25191
  • 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 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 RHSA-2026:25533
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.145.1.el8_8, kernel 4.18.0-477.145.1.el8_8, bpftool 4.18.0-477.145.1.el8_8, kernel-core 4.18.0-477.145.1.el8_8, kernel-tools 4.18.0-477.145.1.el8_8, python3-perf 4.18.0-477.145.1.el8_8, +14 more
    fixed: vendor fix RHSA-2026:22964
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.174.1.el9_2, kernel 5.14.0-284.174.1.el9_2, kernel-64k 5.14.0-284.174.1.el9_2, kernel-core 5.14.0-284.174.1.el9_2, kernel-tools 5.14.0-284.174.1.el9_2, python3-perf 5.14.0-284.174.1.el9_2, +33 more
    fixed: vendor fix RHSA-2026:22940
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.129.1.el9_4, kernel 5.14.0-427.129.1.el9_4, kernel-64k 5.14.0-427.129.1.el9_4, kernel-core 5.14.0-427.129.1.el9_4, kernel-tools 5.14.0-427.129.1.el9_4, python3-perf 5.14.0-427.129.1.el9_4, +33 more
    fixed: vendor fix RHSA-2026:23237
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.77.1.el10_0, kernel-64k 6.12.0-55.77.1.el10_0, kernel-core 6.12.0-55.77.1.el10_0, kernel-tools 6.12.0-55.77.1.el10_0, kernel-modules 6.12.0-55.77.1.el10_0, kernel-64k-core 6.12.0-55.77.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:24343
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.119.1.el9_6, kernel-64k 5.14.0-570.119.1.el9_6, kernel-core 5.14.0-570.119.1.el9_6, kernel-tools 5.14.0-570.119.1.el9_6, kernel-modules 5.14.0-570.119.1.el9_6, kernel-64k-core 5.14.0-570.119.1.el9_6, +32 more
    fixed: vendor fix RHSA-2026:23224
  • 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 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 RHSA-2026:25533
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.145.1.el8_8, kernel 4.18.0-477.145.1.el8_8, bpftool 4.18.0-477.145.1.el8_8, kernel-core 4.18.0-477.145.1.el8_8, kernel-tools 4.18.0-477.145.1.el8_8, python3-perf 4.18.0-477.145.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:22964
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.15.1.el9_8
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.22.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.22.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.22.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.22.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.22.1.el10_2
    fixed: vendor fix RHSA-2026:25191
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.77.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.77.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.77.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.77.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.77.1.el10_0
    fixed: vendor fix RHSA-2026:24343
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.132.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.132.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.132.1.el8_10
    fixed: vendor fix RHSA-2026:25121
  • 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 RHSA-2026:41236
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-kvm 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-core 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-modules 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-debug-kvm 4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-debug-core 4.18.0-553.132.1.rt7.473.el8_10, +4 more
    fixed: vendor fix RHSA-2026:25120
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.15.1.el9_8, kernel-rt-64k 5.14.0-687.15.1.el9_8, kernel-rt-core 5.14.0-687.15.1.el9_8, kernel-rt-modules 5.14.0-687.15.1.el9_8, kernel-rt-64k-core 5.14.0-687.15.1.el9_8, kernel-rt-debug-core 5.14.0-687.15.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.22.1.el10_2, kernel-rt-64k 6.12.0-211.22.1.el10_2, kernel-rt-core 6.12.0-211.22.1.el10_2, kernel-rt-modules 6.12.0-211.22.1.el10_2, kernel-rt-64k-core 6.12.0-211.22.1.el10_2, kernel-rt-debug-core 6.12.0-211.22.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:25191
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-core 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-modules 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-debug-core 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-modules-core 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-debug-modules 5.14.0-284.174.1.rt14.459.el9_2, +4 more
    fixed: vendor fix RHSA-2026:22900
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.129.1.el9_4, kernel-rt-core 5.14.0-427.129.1.el9_4, kernel-rt-modules 5.14.0-427.129.1.el9_4, kernel-rt-debug-core 5.14.0-427.129.1.el9_4, kernel-rt-modules-core 5.14.0-427.129.1.el9_4, kernel-rt-debug-modules 5.14.0-427.129.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:23237
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.77.1.el10_0, kernel-rt-64k 6.12.0-55.77.1.el10_0, kernel-rt-core 6.12.0-55.77.1.el10_0, kernel-rt-modules 6.12.0-55.77.1.el10_0, kernel-rt-64k-core 6.12.0-55.77.1.el10_0, kernel-rt-debug-core 6.12.0-55.77.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:24343
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.119.1.el9_6, kernel-rt-64k 5.14.0-570.119.1.el9_6, kernel-rt-core 5.14.0-570.119.1.el9_6, kernel-rt-modules 5.14.0-570.119.1.el9_6, kernel-rt-64k-core 5.14.0-570.119.1.el9_6, kernel-rt-debug-core 5.14.0-570.119.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:23224
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.15.1.el9_8, kernel-rt-core 5.14.0-687.15.1.el9_8, kernel-rt-modules 5.14.0-687.15.1.el9_8, kernel-rt-debug-core 5.14.0-687.15.1.el9_8, kernel-rt-modules-core 5.14.0-687.15.1.el9_8, kernel-rt-debug-modules 5.14.0-687.15.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.22.1.el10_2, kernel-rt-core 6.12.0-211.22.1.el10_2, kernel-rt-modules 6.12.0-211.22.1.el10_2, kernel-rt-debug-core 6.12.0-211.22.1.el10_2, kernel-rt-modules-core 6.12.0-211.22.1.el10_2, kernel-rt-debug-modules 6.12.0-211.22.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:25191
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-kvm 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-core 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-modules 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-debug-kvm 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-debug-core 5.14.0-284.174.1.rt14.459.el9_2, +6 more
    fixed: vendor fix RHSA-2026:22900
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.129.1.el9_4, kernel-rt-kvm 5.14.0-427.129.1.el9_4, kernel-rt-core 5.14.0-427.129.1.el9_4, kernel-rt-modules 5.14.0-427.129.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.129.1.el9_4, kernel-rt-debug-core 5.14.0-427.129.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:23237
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.77.1.el10_0, kernel-rt-kvm 6.12.0-55.77.1.el10_0, kernel-rt-core 6.12.0-55.77.1.el10_0, kernel-rt-modules 6.12.0-55.77.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.77.1.el10_0, kernel-rt-debug-core 6.12.0-55.77.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:24343

17 more fixed, 1 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
yes
Technical impact
total
Assessed
23 d ago

Exploit prediction

0.69% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/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
  • Red Hat Red Hat OpenShift Container Platform 4.22

Classification

Weakness
  • CWE-843 Access of Resource Using Incompatible Type
  • CWE-121 Stack-based Buffer Overflow
  • CWE-787 Out-of-bounds Write
Technology feeds

References

Sources

Fencer Vulns 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.