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Fencer Vulns
high 7.8

CVE-2026-81000 json

net: tun: bound receive headroom

published 2026-09-11 58 d ago modified 2026-10-19 21 d ago also EUVD-2026-76323

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 29%
public exploits
0
none known

Summary

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

net: tun: bound receive headroom

tun_get_user() uses tun->align both as skb headroom and when choosing how much packet data to keep linear. OVS can propagate an oversized headroom request from another port to TUN or TAP.

When align is larger than the usable space in a one-page skb head, SKB_MAX_HEAD(align) underflows and the result becomes negative when stored in good_linear. That value later wraps when assigned to the size_t linear variable, and tun_alloc_skb() can place skb->data outside the allocated head.

Bound the headroom stored by TUN to the one-page skb-head budget and the largest non-sentinel 16-bit skb header offset. Leave one linear byte for raw TUN and a complete Ethernet header for TAP, including NET_IP_ALIGN.

Also pull the raw-TUN protocol byte and the TAP Ethernet header before accessing them, so these checks remain safe for nonlinear skbs supplied by other allocation paths.

Patch / fix

  • Linux Linux 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4, 7.3
  • linux Debian 12 6.1.190-1
  • linux Debian 13 6.12.111-1
  • linux Debian 14 7.2.6-1
  • linux-6.12 Debian 12 6.12.111-1~deb12u1

debian advisories DEBIAN-CVE-2026-81000

  • linux Ubuntu 22.04 LTS 5.15.0-202.212
  • linux Ubuntu 26.04 LTS 7.0.0-42.42
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1119.126
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1016.17
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1120.130
  • linux-gcp Ubuntu 26.04 LTS 7.0.0-1016.18
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1115.121
  • linux-ibm Ubuntu 22.04 LTS 5.15.0-1113.117

ubuntu advisories UBUNTU-CVE-2026-81000

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 6.12.0-259.27.el10nv
  • rv enterprise linux nvidia 10 6.12.0-259.27.el10nv
  • perf enterprise linux nvidia 10 6.12.0-259.27.el10nv
  • rtla enterprise linux nvidia 10 6.12.0-259.27.el10nv
  • libperf enterprise linux nvidia 10 6.12.0-259.27.el10nv
  • kernel-64k enterprise linux nvidia 10 6.12.0-259.27.el10nv
  • kernel-core enterprise linux nvidia 10 6.12.0-259.27.el10nv
  • kernel-tools enterprise linux nvidia 10 6.12.0-259.27.el10nv

red hat advisories RHSA-2026:73788RHSA-2026:71687RHSA-2026:71657RHSA-2026:71631RHSA-2026:71606RHSA-2026:71601

  • kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.84.1
  • kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.84.1
  • kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.84.1
  • kernel-source SLE Module for Development Tools 15 SP7, SLE Module for Basesystem 15 SP7 6.4.0-150700.53.84.1
  • kernel-default SLE Workstation Extension 15 SP7, SLE Module for Legacy 15 SP7, SLE Module for Basesystem 15 SP7 +2 more 6.4.0-150700.53.84.1
  • kernel-zfcpdump SLE Module for Basesystem 15 SP7 6.4.0-150700.53.84.1
  • kernel-obs-build SLE Module for Development Tools 15 SP7 6.4.0-150700.53.84.1
  • kernel-default-base SLE Module for Basesystem 15 SP7 6.4.0-150700.53.84.1.150700.17.47.1

suse advisories SUSE-SU-2026:4706-1SUSE-SU-2026:4687-1SUSE-SU-2026:4668-1SUSE-SU-2026:4667-1SUSE-SU-2026:4666-1SUSE-SU-2026:4665-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.39.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.39.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.39.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.39.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.39.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.39.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.39.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.39.1

opensuse advisories openSUSE-SU-2026:22091-1openSUSE-SU-2026:11805-1

  • kernel AlmaLinux 9 5.14.0-687.51.1.el9_8
  • kernel-64k AlmaLinux 9 5.14.0-687.51.1.el9_8
  • kernel-core AlmaLinux 9 5.14.0-687.51.1.el9_8
  • kernel-64k-core AlmaLinux 9 5.14.0-687.51.1.el9_8
  • kernel-debug-core AlmaLinux 9 5.14.0-687.51.1.el9_8
  • kernel-64k-modules AlmaLinux 9 5.14.0-687.51.1.el9_8
  • kernel-debug-modules AlmaLinux 9 5.14.0-687.51.1.el9_8
  • kernel-64k-debug-core AlmaLinux 9 5.14.0-687.51.1.el9_8

almalinux advisories ALSA-2026:71232ALSA-2026:71233ALSA-2026:71016ALSA-2026:71213

  • kernel Rocky Linux 9 5.14.0-687.51.1.el9_8

rocky linux advisories RLSA-2026:71232

  • kernel Azure Linux 3.0 6.6.157.1-1

azure linux advisories AZL-100232

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

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-2026-81000 updated cvss 7.8

kernel: net: tun: bound receive headroom

  • 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 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “See the security bulletin for a detailed mitigation procedure.”
  • Red Hat NVIDIA for RHEL 10 rv 6.12.0-259.27.el10nv, perf 6.12.0-259.27.el10nv, rtla 6.12.0-259.27.el10nv, kernel 6.12.0-259.27.el10nv, libperf 6.12.0-259.27.el10nv, kernel-64k 6.12.0-259.27.el10nv, +28 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:73788
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.144.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.144.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.144.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.144.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.144.1.el9_6
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71631
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.51.1.el9_8, perf 5.14.0-687.51.1.el9_8, rtla 5.14.0-687.51.1.el9_8, python3-perf 5.14.0-687.51.1.el9_8, kernel-devel-matched 5.14.0-687.51.1.el9_8, kernel-64k-devel-matched 5.14.0-687.51.1.el9_8, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71232
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.59.1.el10_2, perf 6.12.0-211.59.1.el10_2, rtla 6.12.0-211.59.1.el10_2, python3-perf 6.12.0-211.59.1.el10_2, kernel-devel-matched 6.12.0-211.59.1.el10_2, kernel-64k-devel-matched 6.12.0-211.59.1.el10_2, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71233
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.194.1.el9_2, rtla 5.14.0-284.194.1.el9_2, kernel-devel-matched 5.14.0-284.194.1.el9_2, kernel-64k-devel-matched 5.14.0-284.194.1.el9_2, kernel-debug-devel-matched 5.14.0-284.194.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.194.1.el9_2, +5 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71601
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.152.1.el9_4, perf 5.14.0-427.152.1.el9_4, rtla 5.14.0-427.152.1.el9_4, kernel-devel-matched 5.14.0-427.152.1.el9_4, kernel-64k-devel-matched 5.14.0-427.152.1.el9_4, kernel-debug-devel-matched 5.14.0-427.152.1.el9_4, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71569
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.107.1.el10_0, perf 6.12.0-55.107.1.el10_0, rtla 6.12.0-55.107.1.el10_0, python3-perf 6.12.0-55.107.1.el10_0, kernel-devel-matched 6.12.0-55.107.1.el10_0, kernel-64k-devel-matched 6.12.0-55.107.1.el10_0, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71599
show 31 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.144.1.el9_6, perf 5.14.0-570.144.1.el9_6, rtla 5.14.0-570.144.1.el9_6, python3-perf 5.14.0-570.144.1.el9_6, kernel-devel-matched 5.14.0-570.144.1.el9_6, kernel-64k-devel-matched 5.14.0-570.144.1.el9_6, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71631
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.167.1.el8_10, kernel 4.18.0-553.167.1.el8_10, bpftool 4.18.0-553.167.1.el8_10, kernel-core 4.18.0-553.167.1.el8_10, kernel-tools 4.18.0-553.167.1.el8_10, python3-perf 4.18.0-553.167.1.el8_10, +20 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71213
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.51.1.el9_8, kernel-64k 5.14.0-687.51.1.el9_8, kernel-core 5.14.0-687.51.1.el9_8, kernel-tools 5.14.0-687.51.1.el9_8, kernel-modules 5.14.0-687.51.1.el9_8, kernel-64k-core 5.14.0-687.51.1.el9_8, +29 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71232
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.59.1.el10_2, kernel-64k 6.12.0-211.59.1.el10_2, kernel-core 6.12.0-211.59.1.el10_2, kernel-tools 6.12.0-211.59.1.el10_2, kernel-modules 6.12.0-211.59.1.el10_2, kernel-64k-core 6.12.0-211.59.1.el10_2, +28 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71233
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.209.1.el8_4, kernel 4.18.0-305.209.1.el8_4, bpftool 4.18.0-305.209.1.el8_4, kernel-core 4.18.0-305.209.1.el8_4, kernel-tools 4.18.0-305.209.1.el8_4, python3-perf 4.18.0-305.209.1.el8_4, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71565
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.218.1.el8_6, kernel 4.18.0-372.218.1.el8_6, bpftool 4.18.0-372.218.1.el8_6, kernel-core 4.18.0-372.218.1.el8_6, kernel-tools 4.18.0-372.218.1.el8_6, python3-perf 4.18.0-372.218.1.el8_6, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71592
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.170.1.el8_8, kernel 4.18.0-477.170.1.el8_8, bpftool 4.18.0-477.170.1.el8_8, kernel-core 4.18.0-477.170.1.el8_8, kernel-tools 4.18.0-477.170.1.el8_8, python3-perf 4.18.0-477.170.1.el8_8, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71594
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.194.1.el9_2, kernel 5.14.0-284.194.1.el9_2, kernel-64k 5.14.0-284.194.1.el9_2, kernel-core 5.14.0-284.194.1.el9_2, kernel-tools 5.14.0-284.194.1.el9_2, python3-perf 5.14.0-284.194.1.el9_2, +33 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71601
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.152.1.el9_4, kernel 5.14.0-427.152.1.el9_4, kernel-64k 5.14.0-427.152.1.el9_4, kernel-core 5.14.0-427.152.1.el9_4, kernel-tools 5.14.0-427.152.1.el9_4, python3-perf 5.14.0-427.152.1.el9_4, +33 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71569
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.107.1.el10_0, kernel-64k 6.12.0-55.107.1.el10_0, kernel-core 6.12.0-55.107.1.el10_0, kernel-tools 6.12.0-55.107.1.el10_0, kernel-modules 6.12.0-55.107.1.el10_0, kernel-64k-core 6.12.0-55.107.1.el10_0, +27 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71599
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.144.1.el9_6, kernel-64k 5.14.0-570.144.1.el9_6, kernel-core 5.14.0-570.144.1.el9_6, kernel-tools 5.14.0-570.144.1.el9_6, kernel-modules 5.14.0-570.144.1.el9_6, kernel-64k-core 5.14.0-570.144.1.el9_6, +32 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71631
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.209.1.el8_4, kernel 4.18.0-305.209.1.el8_4, bpftool 4.18.0-305.209.1.el8_4, kernel-core 4.18.0-305.209.1.el8_4, kernel-tools 4.18.0-305.209.1.el8_4, python3-perf 4.18.0-305.209.1.el8_4, +15 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71565
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.218.1.el8_6, kernel 4.18.0-372.218.1.el8_6, bpftool 4.18.0-372.218.1.el8_6, kernel-core 4.18.0-372.218.1.el8_6, kernel-tools 4.18.0-372.218.1.el8_6, python3-perf 4.18.0-372.218.1.el8_6, +15 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71592
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.170.1.el8_8, kernel 4.18.0-477.170.1.el8_8, bpftool 4.18.0-477.170.1.el8_8, kernel-core 4.18.0-477.170.1.el8_8, kernel-tools 4.18.0-477.170.1.el8_8, python3-perf 4.18.0-477.170.1.el8_8, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71594
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.51.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.51.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.51.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.51.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.51.1.el9_8
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71232
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.59.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.59.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.59.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.59.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.59.1.el10_2
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71233
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.107.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.107.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.107.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.107.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.107.1.el10_0
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71599
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.167.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.167.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.167.1.el8_10
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71213
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.164.1.rt56.1316.el7, kernel-rt-trace 3.10.0-1160.164.1.rt56.1316.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.164.1.rt56.1316.el7
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71657
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.167.1.rt7.508.el8_10, kernel-rt-kvm 4.18.0-553.167.1.rt7.508.el8_10, kernel-rt-core 4.18.0-553.167.1.rt7.508.el8_10, kernel-rt-modules 4.18.0-553.167.1.rt7.508.el8_10, kernel-rt-debug-kvm 4.18.0-553.167.1.rt7.508.el8_10, kernel-rt-debug-core 4.18.0-553.167.1.rt7.508.el8_10, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71016
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.51.1.el9_8, kernel-rt-64k 5.14.0-687.51.1.el9_8, kernel-rt-core 5.14.0-687.51.1.el9_8, kernel-rt-modules 5.14.0-687.51.1.el9_8, kernel-rt-64k-core 5.14.0-687.51.1.el9_8, kernel-rt-debug-core 5.14.0-687.51.1.el9_8, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71232
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.59.1.el10_2, kernel-rt-64k 6.12.0-211.59.1.el10_2, kernel-rt-core 6.12.0-211.59.1.el10_2, kernel-rt-modules 6.12.0-211.59.1.el10_2, kernel-rt-64k-core 6.12.0-211.59.1.el10_2, kernel-rt-debug-core 6.12.0-211.59.1.el10_2, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71233
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.194.1.rt14.479.el9_2, kernel-rt-core 5.14.0-284.194.1.rt14.479.el9_2, kernel-rt-modules 5.14.0-284.194.1.rt14.479.el9_2, kernel-rt-debug-core 5.14.0-284.194.1.rt14.479.el9_2, kernel-rt-modules-core 5.14.0-284.194.1.rt14.479.el9_2, kernel-rt-debug-modules 5.14.0-284.194.1.rt14.479.el9_2, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71606
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.152.1.el9_4, kernel-rt-core 5.14.0-427.152.1.el9_4, kernel-rt-modules 5.14.0-427.152.1.el9_4, kernel-rt-debug-core 5.14.0-427.152.1.el9_4, kernel-rt-modules-core 5.14.0-427.152.1.el9_4, kernel-rt-debug-modules 5.14.0-427.152.1.el9_4, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71569
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.107.1.el10_0, kernel-rt-64k 6.12.0-55.107.1.el10_0, kernel-rt-core 6.12.0-55.107.1.el10_0, kernel-rt-modules 6.12.0-55.107.1.el10_0, kernel-rt-64k-core 6.12.0-55.107.1.el10_0, kernel-rt-debug-core 6.12.0-55.107.1.el10_0, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71599
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.144.1.el9_6, kernel-rt-64k 5.14.0-570.144.1.el9_6, kernel-rt-core 5.14.0-570.144.1.el9_6, kernel-rt-modules 5.14.0-570.144.1.el9_6, kernel-rt-64k-core 5.14.0-570.144.1.el9_6, kernel-rt-debug-core 5.14.0-570.144.1.el9_6, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71631
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.51.1.el9_8, kernel-rt-core 5.14.0-687.51.1.el9_8, kernel-rt-modules 5.14.0-687.51.1.el9_8, kernel-rt-debug-core 5.14.0-687.51.1.el9_8, kernel-rt-modules-core 5.14.0-687.51.1.el9_8, kernel-rt-debug-modules 5.14.0-687.51.1.el9_8, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71232
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.59.1.el10_2, kernel-rt-core 6.12.0-211.59.1.el10_2, kernel-rt-modules 6.12.0-211.59.1.el10_2, kernel-rt-debug-core 6.12.0-211.59.1.el10_2, kernel-rt-modules-core 6.12.0-211.59.1.el10_2, kernel-rt-debug-modules 6.12.0-211.59.1.el10_2, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71233
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.194.1.rt14.479.el9_2, kernel-rt-kvm 5.14.0-284.194.1.rt14.479.el9_2, kernel-rt-core 5.14.0-284.194.1.rt14.479.el9_2, kernel-rt-modules 5.14.0-284.194.1.rt14.479.el9_2, kernel-rt-debug-kvm 5.14.0-284.194.1.rt14.479.el9_2, kernel-rt-debug-core 5.14.0-284.194.1.rt14.479.el9_2, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71606
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.152.1.el9_4, kernel-rt-kvm 5.14.0-427.152.1.el9_4, kernel-rt-core 5.14.0-427.152.1.el9_4, kernel-rt-modules 5.14.0-427.152.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.152.1.el9_4, kernel-rt-debug-core 5.14.0-427.152.1.el9_4, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71569
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.107.1.el10_0, kernel-rt-kvm 6.12.0-55.107.1.el10_0, kernel-rt-core 6.12.0-55.107.1.el10_0, kernel-rt-modules 6.12.0-55.107.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.107.1.el10_0, kernel-rt-debug-core 6.12.0-55.107.1.el10_0, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:71599

15 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
no
Technical impact
total
Assessed
23 d ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

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

Affected products

  • Linux Linux

Classification

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.