CVE-2024-41012

Kernel-memory disclosure via unreliably removed POSIX locks

Published Jul 23, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel POSIX file locking allows local users to read kernel memory by racing fcntl() against close(). The fcntl_setlk() cleanup path calls do_lock_file_wait(), which can fail after a security-module denial or allocation failure and leave a freed lock visible to lock_get_status(). Exploitation requires local low-privileged code to win the race and then read /proc/locks; the resulting stale reads disclose kernel memory but do not modify it.

CVSS severity7.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel POSIX file locking allows local users to read kernel memory by racing fcntl() against close(). The fcntl_setlk() cleanup path calls do_lock_file_wait(), which can fail after a security-module denial or allocation failure and leave a freed lock visible to lock_get_status(). Exploitation requires local low-privileged code to win the race and then read /proc/locks; the resulting stale reads disclose kernel memory but do not modify it.

The record

CVE
CVE-2024-41012
Published
Jul 23, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 23, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=2.6.13
  2. Affected versionversion=c293621bbf678a3d85e3ed721c3921c8a670610d <3cad1bc010416c6dd780643476bc59ed742436b9
  3. Affected versionversion=c293621bbf678a3d85e3ed721c3921c8a670610d <52c87ab18c76c14d7209646ccb3283b3f5d87b22
  4. Affected versionversion=c293621bbf678a3d85e3ed721c3921c8a670610d <5661b9c7ec189406c2dde00837aaa4672efb6240
  5. Affected versionversion=c293621bbf678a3d85e3ed721c3921c8a670610d <5f5d0799eb0a01d550c21b7894e26b2d9db55763
  6. Affected versionversion=c293621bbf678a3d85e3ed721c3921c8a670610d <b6d223942c34057fdfd8f149e763fa823731b224
  7. Affected versionversion=c293621bbf678a3d85e3ed721c3921c8a670610d <d30ff33040834c3b9eee29740acd92f9c7ba2250
  8. Affected versionversion=c293621bbf678a3d85e3ed721c3921c8a670610d <dc2ce1dfceaa0767211a9d963ddb029ab21c4235
  9. Affected versionversion=c293621bbf678a3d85e3ed721c3921c8a670610d <ef8fc41cd6f95f9a4a3470f085aecf350569a0b3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.13; version=c293621bbf678a3d85e3ed721c3921c8a670610d <3cad1bc010416c6dd780643476bc59ed742436b9; version=c293621bbf678a3d85e3ed721c3921c8a670610d <52c87ab18c76c14d7209646ccb3283b3f5d87b22; version=c293621bbf678a3d85e3ed721c3921c8a670610d <5661b9c7ec189406c2dde00837aaa4672efb6240; version=c293621bbf678a3d85e3ed721c3921c8a670610d <5f5d0799eb0a01d550c21b7894e26b2d9db55763; version=c293621bbf678a3d85e3ed721c3921c8a670610d <b6d223942c34057fdfd8f149e763fa823731b224; version=c293621bbf678a3d85e3ed721c3921c8a670610d <d30ff33040834c3b9eee29740acd92f9c7ba2250; version=c293621bbf678a3d85e3ed721c3921c8a670610d <dc2ce1dfceaa0767211a9d963ddb029ab21c4235; version=c293621bbf678a3d85e3ed721c3921c8a670610d <ef8fc41cd6f95f9a4a3470f085aecf350569a0b3

Published CVSS scores

6.3NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
7.8Linux Kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 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-416Use After Free

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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