CVE-2024-26655

Local denial of service via leaked clock context

Published Apr 1, 2024 · Updated May 11, 2026

Memory leak in the Linux kernel 6.7 through 6.8.2 allows local users to consume kernel memory by opening a failing POSIX clock. posix_clock_open() allocates pccontext before calling clk->ops.open(), but its error path returns without releasing that allocation. Exploitation requires low-privilege local access and a clock whose open callback fails; repeated triggering can exhaust memory and interrupt the host.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the Linux kernel 6.7 through 6.8.2 allows local users to consume kernel memory by opening a failing POSIX clock. posix_clock_open() allocates pccontext before calling clk->ops.open(), but its error path returns without releasing that allocation. Exploitation requires low-privilege local access and a clock whose open callback fails; repeated triggering can exhaust memory and interrupt the host.

The record

CVE
CVE-2024-26655
Published
Apr 1, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 1, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=221e4d1e29bb442ac4c47bc8ee095abf009ee8f3 <ea2d9bfd422e92fd197f6a0b1fe7d81413b871e0
  2. Affected versionversion=60c6946675fc06dd2fd2b7a4b6fd1c1f046f1056 <0200dd7ed2335469955d7e69cc1a6fa7df1f3847
  3. Affected versionversion=60c6946675fc06dd2fd2b7a4b6fd1c1f046f1056 <5b4cdd9c5676559b8a7c944ac5269b914b8c0bb8
  4. Affected versionversion=60c6946675fc06dd2fd2b7a4b6fd1c1f046f1056 <a88649b49523e8cbe95254440d803e38c19d2341
  5. Affected versionversion=63cb05f600940a3b4824509e7e0e909f040c82ee <f845cfa1a5ae697782bfcb843c9d06d3bc0cbbb6
  6. Affected versionversion=6.7
  7. Affected versionversion=72ba2204a2a71b6f25873f20eb9329e1e7a01d03 <375abf52353ca5e1a2e5f763629a870f91d0c38a
  8. Affected versionversion=a006fc4485159dc9bc3c4156f433f62b9c2b709c <62a5adf57b56ee94075c889abea518b9dc66895d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=221e4d1e29bb442ac4c47bc8ee095abf009ee8f3 <ea2d9bfd422e92fd197f6a0b1fe7d81413b871e0; version=60c6946675fc06dd2fd2b7a4b6fd1c1f046f1056 <0200dd7ed2335469955d7e69cc1a6fa7df1f3847; version=60c6946675fc06dd2fd2b7a4b6fd1c1f046f1056 <5b4cdd9c5676559b8a7c944ac5269b914b8c0bb8; version=60c6946675fc06dd2fd2b7a4b6fd1c1f046f1056 <a88649b49523e8cbe95254440d803e38c19d2341; version=63cb05f600940a3b4824509e7e0e909f040c82ee <f845cfa1a5ae697782bfcb843c9d06d3bc0cbbb6; version=6.7; version=72ba2204a2a71b6f25873f20eb9329e1e7a01d03 <375abf52353ca5e1a2e5f763629a870f91d0c38a; version=a006fc4485159dc9bc3c4156f433f62b9c2b709c <62a5adf57b56ee94075c889abea518b9dc66895d

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

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime

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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