VulnerabilityPublished 14 Feb 2026Updated 5 Nov 2026

CVE-2026-23142: Linux kernel · mm/damon/sysfs-scheme: cleanup access_pattern subdirs on scheme dir setup failure

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in e9711bd0e64812c694a228cf58c9e6032decee54 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 21:34 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch

Available – fixed in e9711bd0e64812c694a228cf58c9e6032decee54, ae8ac0066b48ed957bdcab58f0d3543549c57a29, 16236b0b4a08fa3e326cf1373ef789dabdc2e30d +2

Exploitation evidence

Disclosed: evidence found.
CVE published 14 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990, < e9711bd0e64812c694a228cf58c9e6032decee54	Fixed in e9711bd0e64812c694a228cf58c9e6032decee54
LinuxLinux	Affected ≥ 9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990, < ae8ac0066b48ed957bdcab58f0d3543549c57a29	Fixed in ae8ac0066b48ed957bdcab58f0d3543549c57a29
LinuxLinux	Affected ≥ 9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990, < 16236b0b4a08fa3e326cf1373ef789dabdc2e30d	Fixed in 16236b0b4a08fa3e326cf1373ef789dabdc2e30d
LinuxLinux	Affected ≥ 9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990, < 725d4fdaa01bd1161782081f419e1568cc7432e0	Fixed in 725d4fdaa01bd1161782081f419e1568cc7432e0
LinuxLinux	Affected ≥ 9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990, < 392b3d9d595f34877dd745b470c711e8ebcd225c	Fixed in 392b3d9d595f34877dd745b470c711e8ebcd225c
LinuxLinux	Affected =5.18	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: mm/damon/sysfs-scheme: cleanup access_pattern subdirs on scheme dir setup failure When a DAMOS-scheme DAMON sysfs directory setup fails after setup of access_pattern/ directory, subdirectories of access_pattern/ 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.

References

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