CVE-2026-23142

Local service interruption via incomplete sysfs cleanup

Published Feb 14, 2026 · Updated Feb 14, 2026

Denial of service in affected Linux Kernel releases beginning with 5.18 allows local users to disrupt the DAMON sysfs interface after setup fails. In mm/damon/sysfs-schemes.c, the scheme setup error path releases the access_pattern object without first removing its sz, nr_accesses, and age subdirectories, leaving sysfs entries and memory allocated. The path exists only when CONFIG_DAMON_SYSFS is enabled, and DAMON control files require root permission; the interface remains nearly unusable until reboot.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Linux Kernel releases beginning with 5.18 allows local users to disrupt the DAMON sysfs interface after setup fails. In mm/damon/sysfs-schemes.c, the scheme setup error path releases the access_pattern object without first removing its sz, nr_accesses, and age subdirectories, leaving sysfs entries and memory allocated. The path exists only when CONFIG_DAMON_SYSFS is enabled, and DAMON control files require root permission; the interface remains nearly unusable until reboot.

The record

CVE
CVE-2026-23142
Published
Feb 14, 2026
Updated
Feb 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.18
  2. Affected versionversion=9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990 <16236b0b4a08fa3e326cf1373ef789dabdc2e30d
  3. Affected versionversion=9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990 <392b3d9d595f34877dd745b470c711e8ebcd225c
  4. Affected versionversion=9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990 <725d4fdaa01bd1161782081f419e1568cc7432e0
  5. Affected versionversion=9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990 <ae8ac0066b48ed957bdcab58f0d3543549c57a29
  6. Affected versionversion=9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990 <e9711bd0e64812c694a228cf58c9e6032decee54

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.18; version=9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990 <16236b0b4a08fa3e326cf1373ef789dabdc2e30d; version=9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990 <392b3d9d595f34877dd745b470c711e8ebcd225c; version=9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990 <725d4fdaa01bd1161782081f419e1568cc7432e0; version=9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990 <ae8ac0066b48ed957bdcab58f0d3543549c57a29; version=9bbb820a5bd5f406ae5e0819cc31f2c2e6f4d990 <e9711bd0e64812c694a228cf58c9e6032decee54

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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