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Fencer Vulns
high 7.8

CVE-2026-64191 json

i2c: stub: Reject I2C block transfers with invalid length

published 2026-07-20 3 mo ago modified 2026-10-19 20 d ago also EUVD-2026-46011

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 5%
public exploits
0
none known

Summary

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

i2c: stub: Reject I2C block transfers with invalid length

The I2C_SMBUS_I2C_BLOCK_DATA case in stub_xfer() uses data->block[0] as the transfer length. The existing check only clamps it to avoid overrunning the chip->words[256] register array, but does not validate it against I2C_SMBUS_BLOCK_MAX (32), which is the limit of the union i2c_smbus_data.block buffer (34 bytes total). The driver is a development/test tool (CONFIG_I2C_STUB=m, not built by default) that must be loaded with a chip_addr= parameter.

A local user with access to /dev/i2c-* can issue an I2C_SMBUS ioctl with I2C_SMBUS_I2C_BLOCK_DATA and data->block[0] > 32, causing stub_xfer() to read or write past the end of the union i2c_smbus_data.block buffer:

BUG: KASAN: stack-out-of-bounds in stub_xfer (drivers/i2c/i2c-stub.c:223) Read of size 1 at addr ffff88800abcfd92 by task exploit/81 Call Trace: <TASK> stub_xfer (drivers/i2c/i2c-stub.c:223) __i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:593) i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:536) i2cdev_ioctl_smbus (drivers/i2c/i2c-dev.c:391) i2cdev_ioctl (drivers/i2c/i2c-dev.c:478) __x64_sys_ioctl (fs/ioctl.c:583) do_syscall_64 (arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) </TASK>

The bug exists because i2c-stub implements .smbus_xfer directly, bypassing the I2C_SMBUS_BLOCK_MAX validation in i2c_smbus_xfer_emulated(). The I2C_SMBUS_BLOCK_DATA case in the same function correctly validates against I2C_SMBUS_BLOCK_MAX, but the I2C_SMBUS_I2C_BLOCK_DATA case does not.

Fix by rejecting transfers with data->block[0] == 0 or data->block[0] > I2C_SMBUS_BLOCK_MAX with -EINVAL, consistent with both the I2C_SMBUS_BLOCK_DATA case in the same function and the I2C_SMBUS_I2C_BLOCK_DATA validation in i2c_smbus_xfer_emulated().

Patch / fix

  • Linux Linux 5.10.260, 5.15.211, 6.1.177, 6.6.144, 6.12.95, 6.18.37, 7.0.14, 7.1
  • linux Debian 12 6.1.177-1
  • linux Debian 13 6.12.95-1
  • linux Debian 14 7.0.14-1

debian advisories DEBIAN-CVE-2026-64191

  • linux Ubuntu 22.04 LTS 5.15.0-198.208
  • linux Ubuntu 24.04 LTS 6.8.0-147.147
  • linux Ubuntu 26.04 LTS 7.0.0-31.31
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1117.124
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1067.70
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1012.12
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1118.128
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1071.79

ubuntu advisories UBUNTU-CVE-2026-64191

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 10.2 6.12.0-211.65.1.el10_2
  • rv RHEL 10.2 6.12.0-211.65.1.el10_2
  • perf RHEL 10.2 6.12.0-211.65.1.el10_2
  • rtla RHEL 10.2 6.12.0-211.65.1.el10_2
  • libperf RHEL 10.2 6.12.0-211.65.1.el10_2
  • kernel-rt RHEL 10.2 6.12.0-211.65.1.el10_2
  • kernel-64k RHEL 10.2 6.12.0-211.65.1.el10_2
  • kernel-core RHEL 10.2 6.12.0-211.65.1.el10_2

red hat advisories RHSA-2026:81406RHSA-2026:77214RHSA-2026:77215RHSA-2026:75560RHSA-2026:73645RHSA-2026:70308

  • kernel-rt Real Time Module 15 SP7 6.4.0-150700.7.72.1
  • kernel-syms-rt Real Time Module 15 SP7 6.4.0-150700.7.72.1
  • kernel-source-rt Real Time Module 15 SP7 6.4.0-150700.7.72.1
  • kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.78.1
  • kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.78.1
  • kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.78.1
  • kernel-source SLE Module for Development Tools 15 SP7, SLE Module for Basesystem 15 SP7 6.4.0-150700.53.78.1
  • kernel-default SLE Workstation Extension 15 SP7, SLE Module for Legacy 15 SP7, SLE Module for Basesystem 15 SP7 +2 more 6.4.0-150700.53.78.1

suse advisories SUSE-SU-2026:4687-1SUSE-SU-2026:3810-1SUSE-SU-2026:3790-1SUSE-SU-2026:23244-1SUSE-SU-2026:23241-1SUSE-SU-2026:23194-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.37.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.37.1

opensuse advisories openSUSE-SU-2026:21555-1

  • kernel AlmaLinux 10 6.12.0-211.65.1.el10_2
  • rv AlmaLinux 10 6.12.0-211.65.1.el10_2
  • perf AlmaLinux 10 6.12.0-211.65.1.el10_2
  • rtla AlmaLinux 10 6.12.0-211.65.1.el10_2
  • libperf AlmaLinux 10 6.12.0-211.65.1.el10_2
  • kernel-rt AlmaLinux 10 6.12.0-211.65.1.el10_2
  • kernel-64k AlmaLinux 10 6.12.0-211.65.1.el10_2
  • kernel-core AlmaLinux 10 6.12.0-211.65.1.el10_2

almalinux advisories ALSA-2026:81406ALSA-2026:59723ALSA-2026:59737ALSA-2026:59821

  • kernel Rocky Linux 10 6.12.0-211.72.1.el10_2
  • kernel Rocky Linux 10 6.12.0-211.65.1.el10_2
  • kernel Rocky Linux 9 5.14.0-687.42.1.el9_8
  • kernel-rt Rocky Linux 8 4.18.0-553.158.1.rt7.499.el8_10
  • kernel Rocky Linux 8 4.18.0-553.158.1.el8_10

rocky linux advisories RLSA-2026:93413RLSA-2026:81406RLSA-2026:59723RLSA-2026:59737RLSA-2026:59821

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-2026-64191 updated cvss 7.0

kernel: i2c: stub: Reject I2C block transfers with invalid length

  • 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: no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.140.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.140.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.140.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.140.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.140.1.el9_6
    fixed: vendor fix RHSA-2026:65708
  • Red Hat Enterprise Linux kernel-modules-internal 6.12.0-211.65.1.el10_2, kernel-modules-internal 6.12.0-211.72.1.el10_2
    fixed: vendor fix RHSA-2026:81406
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.42.1.el9_8, perf 5.14.0-687.42.1.el9_8, rtla 5.14.0-687.42.1.el9_8, python3-perf 5.14.0-687.42.1.el9_8, kernel-devel-matched 5.14.0-687.42.1.el9_8, kernel-64k-devel-matched 5.14.0-687.42.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:59723
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.65.1.el10_2, rv 6.12.0-211.72.1.el10_2, perf 6.12.0-211.65.1.el10_2, perf 6.12.0-211.72.1.el10_2, rtla 6.12.0-211.65.1.el10_2, rtla 6.12.0-211.72.1.el10_2, +20 more
    fixed: vendor fix RHSA-2026:81406
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.195.1.el9_2, rtla 5.14.0-284.195.1.el9_2, kernel-devel-matched 5.14.0-284.195.1.el9_2, kernel-64k-devel-matched 5.14.0-284.195.1.el9_2, kernel-debug-devel-matched 5.14.0-284.195.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.195.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:77215
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.153.1.el9_4, perf 5.14.0-427.153.1.el9_4, rtla 5.14.0-427.153.1.el9_4, kernel-devel-matched 5.14.0-427.153.1.el9_4, kernel-64k-devel-matched 5.14.0-427.153.1.el9_4, kernel-debug-devel-matched 5.14.0-427.153.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:73645
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.108.1.el10_0, perf 6.12.0-55.108.1.el10_0, rtla 6.12.0-55.108.1.el10_0, python3-perf 6.12.0-55.108.1.el10_0, kernel-devel-matched 6.12.0-55.108.1.el10_0, kernel-64k-devel-matched 6.12.0-55.108.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:75560
show 32 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.140.1.el9_6, perf 5.14.0-570.140.1.el9_6, rtla 5.14.0-570.140.1.el9_6, python3-perf 5.14.0-570.140.1.el9_6, kernel-devel-matched 5.14.0-570.140.1.el9_6, kernel-64k-devel-matched 5.14.0-570.140.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:65708
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.158.1.el8_10, kernel 4.18.0-553.158.1.el8_10, bpftool 4.18.0-553.158.1.el8_10, kernel-core 4.18.0-553.158.1.el8_10, kernel-tools 4.18.0-553.158.1.el8_10, python3-perf 4.18.0-553.158.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:59821
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.42.1.el9_8, kernel-64k 5.14.0-687.42.1.el9_8, kernel-core 5.14.0-687.42.1.el9_8, kernel-tools 5.14.0-687.42.1.el9_8, kernel-modules 5.14.0-687.42.1.el9_8, kernel-64k-core 5.14.0-687.42.1.el9_8, +27 more
    fixed: vendor fix RHSA-2026:59723
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.65.1.el10_2, kernel 6.12.0-211.72.1.el10_2, kernel-64k 6.12.0-211.65.1.el10_2, kernel-64k 6.12.0-211.72.1.el10_2, kernel-core 6.12.0-211.65.1.el10_2, kernel-core 6.12.0-211.72.1.el10_2, +62 more
    fixed: vendor fix RHSA-2026:81406
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.206.1.el8_4, kernel 4.18.0-305.206.1.el8_4, bpftool 4.18.0-305.206.1.el8_4, kernel-core 4.18.0-305.206.1.el8_4, kernel-tools 4.18.0-305.206.1.el8_4, python3-perf 4.18.0-305.206.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:65710
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.213.1.el8_6, kernel 4.18.0-372.213.1.el8_6, bpftool 4.18.0-372.213.1.el8_6, kernel-core 4.18.0-372.213.1.el8_6, kernel-tools 4.18.0-372.213.1.el8_6, python3-perf 4.18.0-372.213.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:65711
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.166.1.el8_8, kernel 4.18.0-477.166.1.el8_8, bpftool 4.18.0-477.166.1.el8_8, kernel-core 4.18.0-477.166.1.el8_8, kernel-tools 4.18.0-477.166.1.el8_8, python3-perf 4.18.0-477.166.1.el8_8, +9 more
    fixed: vendor fix RHSA-2026:65709
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.195.1.el9_2, kernel 5.14.0-284.195.1.el9_2, kernel-64k 5.14.0-284.195.1.el9_2, kernel-core 5.14.0-284.195.1.el9_2, kernel-tools 5.14.0-284.195.1.el9_2, python3-perf 5.14.0-284.195.1.el9_2, +28 more
    fixed: vendor fix RHSA-2026:77215
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.153.1.el9_4, kernel 5.14.0-427.153.1.el9_4, kernel-64k 5.14.0-427.153.1.el9_4, kernel-core 5.14.0-427.153.1.el9_4, kernel-tools 5.14.0-427.153.1.el9_4, python3-perf 5.14.0-427.153.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:73645
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.108.1.el10_0, kernel-64k 6.12.0-55.108.1.el10_0, kernel-core 6.12.0-55.108.1.el10_0, kernel-tools 6.12.0-55.108.1.el10_0, kernel-modules 6.12.0-55.108.1.el10_0, kernel-64k-core 6.12.0-55.108.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:75560
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.140.1.el9_6, kernel-64k 5.14.0-570.140.1.el9_6, kernel-core 5.14.0-570.140.1.el9_6, kernel-tools 5.14.0-570.140.1.el9_6, kernel-modules 5.14.0-570.140.1.el9_6, kernel-64k-core 5.14.0-570.140.1.el9_6, +27 more
    fixed: vendor fix RHSA-2026:65708
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.206.1.el8_4, kernel 4.18.0-305.206.1.el8_4, bpftool 4.18.0-305.206.1.el8_4, kernel-core 4.18.0-305.206.1.el8_4, kernel-tools 4.18.0-305.206.1.el8_4, python3-perf 4.18.0-305.206.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:65710
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.213.1.el8_6, kernel 4.18.0-372.213.1.el8_6, bpftool 4.18.0-372.213.1.el8_6, kernel-core 4.18.0-372.213.1.el8_6, kernel-tools 4.18.0-372.213.1.el8_6, python3-perf 4.18.0-372.213.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:65711
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.166.1.el8_8, kernel 4.18.0-477.166.1.el8_8, bpftool 4.18.0-477.166.1.el8_8, kernel-core 4.18.0-477.166.1.el8_8, kernel-tools 4.18.0-477.166.1.el8_8, python3-perf 4.18.0-477.166.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:65709
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.42.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.42.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.42.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.42.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.42.1.el9_8
    fixed: vendor fix RHSA-2026:59723
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.65.1.el10_2, libperf 6.12.0-211.72.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.65.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.72.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.65.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.72.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:81406
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.108.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.108.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.108.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.108.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.108.1.el10_0
    fixed: vendor fix RHSA-2026:75560
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.158.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.158.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.158.1.el8_10
    fixed: vendor fix RHSA-2026:59821
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.162.1.rt56.1314.el7, kernel-rt-trace 3.10.0-1160.162.1.rt56.1314.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.162.1.rt56.1314.el7
    fixed: vendor fix RHSA-2026:70308
  • Red Hat Enterprise Linux Hidden (v. 10) kernel-modules-internal 6.12.0-211.65.1.el10_2, kernel-modules-internal 6.12.0-211.72.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.65.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.72.1.el10_2
    fixed: vendor fix RHSA-2026:81406
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-kvm 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-core 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-modules 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-debug-kvm 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-debug-core 4.18.0-553.158.1.rt7.499.el8_10, +4 more
    fixed: vendor fix RHSA-2026:59737
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.42.1.el9_8, kernel-rt-64k 5.14.0-687.42.1.el9_8, kernel-rt-core 5.14.0-687.42.1.el9_8, kernel-rt-modules 5.14.0-687.42.1.el9_8, kernel-rt-64k-core 5.14.0-687.42.1.el9_8, kernel-rt-debug-core 5.14.0-687.42.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:59723
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.65.1.el10_2, kernel-rt 6.12.0-211.72.1.el10_2, kernel-rt-64k 6.12.0-211.65.1.el10_2, kernel-rt-64k 6.12.0-211.72.1.el10_2, kernel-rt-core 6.12.0-211.65.1.el10_2, kernel-rt-core 6.12.0-211.72.1.el10_2, +34 more
    fixed: vendor fix RHSA-2026:81406
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-core 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-modules 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-core 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-modules-core 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-modules 5.14.0-284.195.1.rt14.480.el9_2, +4 more
    fixed: vendor fix RHSA-2026:77214
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.153.1.el9_4, kernel-rt-core 5.14.0-427.153.1.el9_4, kernel-rt-modules 5.14.0-427.153.1.el9_4, kernel-rt-debug-core 5.14.0-427.153.1.el9_4, kernel-rt-modules-core 5.14.0-427.153.1.el9_4, kernel-rt-debug-modules 5.14.0-427.153.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:73645
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.108.1.el10_0, kernel-rt-64k 6.12.0-55.108.1.el10_0, kernel-rt-core 6.12.0-55.108.1.el10_0, kernel-rt-modules 6.12.0-55.108.1.el10_0, kernel-rt-64k-core 6.12.0-55.108.1.el10_0, kernel-rt-debug-core 6.12.0-55.108.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:75560
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.140.1.el9_6, kernel-rt-64k 5.14.0-570.140.1.el9_6, kernel-rt-core 5.14.0-570.140.1.el9_6, kernel-rt-modules 5.14.0-570.140.1.el9_6, kernel-rt-64k-core 5.14.0-570.140.1.el9_6, kernel-rt-debug-core 5.14.0-570.140.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:65708
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.42.1.el9_8, kernel-rt-core 5.14.0-687.42.1.el9_8, kernel-rt-modules 5.14.0-687.42.1.el9_8, kernel-rt-debug-core 5.14.0-687.42.1.el9_8, kernel-rt-modules-core 5.14.0-687.42.1.el9_8, kernel-rt-debug-modules 5.14.0-687.42.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:59723
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.65.1.el10_2, kernel-rt 6.12.0-211.72.1.el10_2, kernel-rt-core 6.12.0-211.65.1.el10_2, kernel-rt-core 6.12.0-211.72.1.el10_2, kernel-rt-modules 6.12.0-211.65.1.el10_2, kernel-rt-modules 6.12.0-211.72.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:81406
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-kvm 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-core 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-modules 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-kvm 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-core 5.14.0-284.195.1.rt14.480.el9_2, +6 more
    fixed: vendor fix RHSA-2026:77214
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.153.1.el9_4, kernel-rt-kvm 5.14.0-427.153.1.el9_4, kernel-rt-core 5.14.0-427.153.1.el9_4, kernel-rt-modules 5.14.0-427.153.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.153.1.el9_4, kernel-rt-debug-core 5.14.0-427.153.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:73645
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.108.1.el10_0, kernel-rt-kvm 6.12.0-55.108.1.el10_0, kernel-rt-core 6.12.0-55.108.1.el10_0, kernel-rt-modules 6.12.0-55.108.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.108.1.el10_0, kernel-rt-debug-core 6.12.0-55.108.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:75560

4 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

0.17% chance of exploitation in the next 30 days, higher than 5% 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

Weakness
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.