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Fencer Vulns
medium 5.5

CVE-2026-23144 json

mm/damon/sysfs: cleanup attrs subdirs on context dir setup failure

published 2026-02-14 8 mo ago modified 2026-10-19 20 d ago also EUVD-2026-5893

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits
0
none known

Summary

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

mm/damon/sysfs: cleanup attrs subdirs on context dir setup failure

When a context DAMON sysfs directory setup is failed after setup of attrs/ directory, subdirectories of attrs/ directory are not cleaned up. As a result, DAMON sysfs interface is nearly broken until the system reboots, and the memory for the unremoved directory is leaked.

Cleanup the directories under such failures.

Patch / fix

  • Linux Linux 6.1.162, 6.6.122, 6.12.67, 6.18.7, 6.19
  • linux Debian 12 6.1.162-1
  • linux Debian 13 6.12.69-1
  • linux Debian 14 6.18.8-1

debian advisories DEBIAN-CVE-2026-23144

  • linux Ubuntu 24.04 LTS 6.8.0-117.117
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1055.58
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1058.61
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1054.60
  • linux-ibm Ubuntu 24.04 LTS 6.8.0-1055.56
  • linux-azure Ubuntu 24.04 LTS 6.8.0-1056.62
  • linux-gkeop Ubuntu 24.04 LTS 6.8.0-1041.44
  • linux-raspi Ubuntu 24.04 LTS 6.8.0-1056.60

ubuntu advisories UBUNTU-CVE-2026-23144

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 6.12.0-124.49.1.el10_1
  • rv RHEL 10.1 6.12.0-124.49.1.el10_1
  • perf RHEL 10.1 6.12.0-124.49.1.el10_1
  • rtla RHEL 10.1 6.12.0-124.49.1.el10_1
  • libperf RHEL 10.1 6.12.0-124.49.1.el10_1
  • kernel-rt RHEL 10.1 6.12.0-124.49.1.el10_1
  • kernel-64k RHEL 10.1 6.12.0-124.49.1.el10_1
  • kernel-core RHEL 10.1 6.12.0-124.49.1.el10_1

red hat advisories RHSA-2026:10108RHSA-2026:9644RHSA-2026:9512RHSA-2026:9112RHSA-2026:8342RHSA-2026:6632

  • kernel-syms SLES 16.0, Linux Micro Extras 6.2, SLES for SAP applications 16.0 6.12.0-160000.27.1
  • kernel-obs-build Linux Micro Extras 6.2 6.12.0-160000.27.1
  • kernel-rt Linux Micro 6.2 6.12.0-160000.27.1
  • kernel-64kb SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.27.1
  • kernel-source SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.27.1
  • kernel-default SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.27.1
  • kernel-default-base SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.27.1.160000.2.8
  • kernel-azure SLES for SAP applications 16.0, SLES 16.0 6.12.0-160000.27.1

suse advisories SUSE-SU-2026:20873-1SUSE-SU-2026:20838-1SUSE-SU-2026:20931-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.27.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.27.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.27.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.27.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.27.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.27.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.27.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.27.1

opensuse advisories openSUSE-SU-2026:20416-1

  • kernel-abi-stablelists AlmaLinux 10 6.12.0-124.49.1.el10_1
  • kernel AlmaLinux 9 5.14.0-611.45.1.el9_7
  • rv AlmaLinux 9 5.14.0-611.45.1.el9_7
  • perf AlmaLinux 9 5.14.0-611.45.1.el9_7
  • rtla AlmaLinux 9 5.14.0-611.45.1.el9_7
  • libperf AlmaLinux 9 5.14.0-611.45.1.el9_7
  • kernel-rt AlmaLinux 9 5.14.0-611.45.1.el9_7
  • kernel-64k AlmaLinux 9 5.14.0-611.45.1.el9_7

almalinux advisories ALSA-2026:6632ALSA-2026:6153

  • kernel Rocky Linux 10 6.12.0-124.49.1.el10_1
  • kernel Rocky Linux 9 5.14.0-611.45.1.el9_7

rocky linux advisories RLSA-2026:6632RLSA-2026:6153

  • kernel Azure Linux 3.0 6.6.126.1-1

azure linux advisories AZL-77685

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-2026-23144 updated cvss 7.3

kernel: Linux kernel: Local denial of service and memory leak in DAMON sysfs via setup failure

  • 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.9.4) libperf 5.14.0-427.121.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.121.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.121.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.121.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.121.1.el9_4
    fixed: vendor fix RHSA-2026:10108
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.108.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.108.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.108.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.108.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.108.1.el9_6
    fixed: vendor fix RHSA-2026:9112
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.45.1.el9_7, perf 5.14.0-611.45.1.el9_7, rtla 5.14.0-611.45.1.el9_7, python3-perf 5.14.0-611.45.1.el9_7, kernel-devel-matched 5.14.0-611.45.1.el9_7, kernel-64k-devel-matched 5.14.0-611.45.1.el9_7, +7 more
    fixed: vendor fix RHSA-2026:6153
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-124.49.1.el10_1, perf 6.12.0-124.49.1.el10_1, rtla 6.12.0-124.49.1.el10_1, python3-perf 6.12.0-124.49.1.el10_1, kernel-devel-matched 6.12.0-124.49.1.el10_1, kernel-64k-devel-matched 6.12.0-124.49.1.el10_1, +7 more
    fixed: vendor fix RHSA-2026:6632
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.166.1.el9_2, rtla 5.14.0-284.166.1.el9_2, kernel-devel-matched 5.14.0-284.166.1.el9_2, kernel-64k-devel-matched 5.14.0-284.166.1.el9_2, kernel-debug-devel-matched 5.14.0-284.166.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.166.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:9644
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.68.1.el10_0, perf 6.12.0-55.68.1.el10_0, rtla 6.12.0-55.68.1.el10_0, python3-perf 6.12.0-55.68.1.el10_0, kernel-devel-matched 6.12.0-55.68.1.el10_0, kernel-64k-devel-matched 6.12.0-55.68.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:8342
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.121.1.el9_4, perf 5.14.0-427.121.1.el9_4, rtla 5.14.0-427.121.1.el9_4, kernel-devel-matched 5.14.0-427.121.1.el9_4, kernel-64k-devel-matched 5.14.0-427.121.1.el9_4, kernel-debug-devel-matched 5.14.0-427.121.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:10108
show 23 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.108.1.el9_6, perf 5.14.0-570.108.1.el9_6, rtla 5.14.0-570.108.1.el9_6, python3-perf 5.14.0-570.108.1.el9_6, kernel-devel-matched 5.14.0-570.108.1.el9_6, kernel-64k-devel-matched 5.14.0-570.108.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:9112
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.45.1.el9_7, kernel-64k 5.14.0-611.45.1.el9_7, kernel-core 5.14.0-611.45.1.el9_7, kernel-tools 5.14.0-611.45.1.el9_7, kernel-modules 5.14.0-611.45.1.el9_7, kernel-64k-core 5.14.0-611.45.1.el9_7, +27 more
    fixed: vendor fix RHSA-2026:6153
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-124.49.1.el10_1, kernel-64k 6.12.0-124.49.1.el10_1, kernel-core 6.12.0-124.49.1.el10_1, kernel-tools 6.12.0-124.49.1.el10_1, kernel-modules 6.12.0-124.49.1.el10_1, kernel-64k-core 6.12.0-124.49.1.el10_1, +28 more
    fixed: vendor fix RHSA-2026:6632
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.166.1.el9_2, kernel 5.14.0-284.166.1.el9_2, kernel-64k 5.14.0-284.166.1.el9_2, kernel-core 5.14.0-284.166.1.el9_2, kernel-tools 5.14.0-284.166.1.el9_2, python3-perf 5.14.0-284.166.1.el9_2, +28 more
    fixed: vendor fix RHSA-2026:9644
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.68.1.el10_0, kernel-64k 6.12.0-55.68.1.el10_0, kernel-core 6.12.0-55.68.1.el10_0, kernel-tools 6.12.0-55.68.1.el10_0, kernel-modules 6.12.0-55.68.1.el10_0, kernel-64k-core 6.12.0-55.68.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:8342
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.121.1.el9_4, kernel 5.14.0-427.121.1.el9_4, kernel-64k 5.14.0-427.121.1.el9_4, kernel-core 5.14.0-427.121.1.el9_4, kernel-tools 5.14.0-427.121.1.el9_4, python3-perf 5.14.0-427.121.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:10108
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.108.1.el9_6, kernel-64k 5.14.0-570.108.1.el9_6, kernel-core 5.14.0-570.108.1.el9_6, kernel-tools 5.14.0-570.108.1.el9_6, kernel-modules 5.14.0-570.108.1.el9_6, kernel-64k-core 5.14.0-570.108.1.el9_6, +27 more
    fixed: vendor fix RHSA-2026:9112
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-611.45.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-611.45.1.el9_7, kernel-debuginfo-common-x86_64 5.14.0-611.45.1.el9_7, kernel-debuginfo-common-aarch64 5.14.0-611.45.1.el9_7, kernel-debuginfo-common-ppc64le 5.14.0-611.45.1.el9_7
    fixed: vendor fix RHSA-2026:6153
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-124.49.1.el10_1, kernel-debuginfo-common-s390x 6.12.0-124.49.1.el10_1, kernel-debuginfo-common-x86_64 6.12.0-124.49.1.el10_1, kernel-debuginfo-common-aarch64 6.12.0-124.49.1.el10_1, kernel-debuginfo-common-ppc64le 6.12.0-124.49.1.el10_1
    fixed: vendor fix RHSA-2026:6632
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.68.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.68.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.68.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.68.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.68.1.el10_0
    fixed: vendor fix RHSA-2026:8342
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-611.45.1.el9_7, kernel-rt-64k 5.14.0-611.45.1.el9_7, kernel-rt-core 5.14.0-611.45.1.el9_7, kernel-rt-modules 5.14.0-611.45.1.el9_7, kernel-rt-64k-core 5.14.0-611.45.1.el9_7, kernel-rt-debug-core 5.14.0-611.45.1.el9_7, +14 more
    fixed: vendor fix RHSA-2026:6153
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-124.49.1.el10_1, kernel-rt-64k 6.12.0-124.49.1.el10_1, kernel-rt-core 6.12.0-124.49.1.el10_1, kernel-rt-modules 6.12.0-124.49.1.el10_1, kernel-rt-64k-core 6.12.0-124.49.1.el10_1, kernel-rt-debug-core 6.12.0-124.49.1.el10_1, +14 more
    fixed: vendor fix RHSA-2026:6632
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-core 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-modules 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-debug-core 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-modules-core 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-debug-modules 5.14.0-284.166.1.rt14.451.el9_2, +4 more
    fixed: vendor fix RHSA-2026:9512
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.68.1.el10_0, kernel-rt-64k 6.12.0-55.68.1.el10_0, kernel-rt-core 6.12.0-55.68.1.el10_0, kernel-rt-modules 6.12.0-55.68.1.el10_0, kernel-rt-64k-core 6.12.0-55.68.1.el10_0, kernel-rt-debug-core 6.12.0-55.68.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:8342
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.121.1.el9_4, kernel-rt-core 5.14.0-427.121.1.el9_4, kernel-rt-modules 5.14.0-427.121.1.el9_4, kernel-rt-debug-core 5.14.0-427.121.1.el9_4, kernel-rt-modules-core 5.14.0-427.121.1.el9_4, kernel-rt-debug-modules 5.14.0-427.121.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:10108
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.108.1.el9_6, kernel-rt-64k 5.14.0-570.108.1.el9_6, kernel-rt-core 5.14.0-570.108.1.el9_6, kernel-rt-modules 5.14.0-570.108.1.el9_6, kernel-rt-64k-core 5.14.0-570.108.1.el9_6, kernel-rt-debug-core 5.14.0-570.108.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:9112
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-611.45.1.el9_7, kernel-rt-core 5.14.0-611.45.1.el9_7, kernel-rt-modules 5.14.0-611.45.1.el9_7, kernel-rt-debug-core 5.14.0-611.45.1.el9_7, kernel-rt-modules-core 5.14.0-611.45.1.el9_7, kernel-rt-debug-modules 5.14.0-611.45.1.el9_7, +4 more
    fixed: vendor fix RHSA-2026:6153
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-124.49.1.el10_1, kernel-rt-core 6.12.0-124.49.1.el10_1, kernel-rt-modules 6.12.0-124.49.1.el10_1, kernel-rt-debug-core 6.12.0-124.49.1.el10_1, kernel-rt-modules-core 6.12.0-124.49.1.el10_1, kernel-rt-debug-modules 6.12.0-124.49.1.el10_1, +4 more
    fixed: vendor fix RHSA-2026:6632
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-kvm 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-core 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-modules 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-debug-kvm 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-debug-core 5.14.0-284.166.1.rt14.451.el9_2, +6 more
    fixed: vendor fix RHSA-2026:9512
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.68.1.el10_0, kernel-rt-kvm 6.12.0-55.68.1.el10_0, kernel-rt-core 6.12.0-55.68.1.el10_0, kernel-rt-modules 6.12.0-55.68.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.68.1.el10_0, kernel-rt-debug-core 6.12.0-55.68.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:8342
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt 5.14.0-427.121.1.el9_4, kernel-rt-kvm 5.14.0-427.121.1.el9_4, kernel-rt-core 5.14.0-427.121.1.el9_4, kernel-rt-modules 5.14.0-427.121.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.121.1.el9_4, kernel-rt-debug-core 5.14.0-427.121.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:10108
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.108.1.el9_6, kernel-rt-kvm 5.14.0-570.108.1.el9_6, kernel-rt-core 5.14.0-570.108.1.el9_6, kernel-rt-modules 5.14.0-570.108.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.108.1.el9_6, kernel-rt-debug-core 5.14.0-570.108.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:9112
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    not affected: vulnerable code not present

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
partial
Assessed
4 mo ago

Exploit prediction

0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
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

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime
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.