CVE-2024-49965Public exploit

Kernel crash via premature OCFS2 lock release

Published Oct 21, 2024 · Updated Aug 5, 2026

Improper locking in the OCFS2 block-read path in Linux allows local users to crash the kernel through operations on a mounted OCFS2 volume. When sb_getblk() fails in ocfs2_read_blocks(), the allocation-error branch releases the metadata-cache I/O lock before the shared exit path releases it again. Reaching the fault requires local access and a mounted OCFS2 filesystem; the resulting bad unlock balance can interrupt the host.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the OCFS2 block-read path in Linux allows local users to crash the kernel through operations on a mounted OCFS2 volume. When sb_getblk() fails in ocfs2_read_blocks(), the allocation-error branch releases the metadata-cache I/O lock before the shared exit path releases it again. Reaching the fault requires local access and a mounted OCFS2 filesystem; the resulting bad unlock balance can interrupt the host.

The record

CVE
CVE-2024-49965
Published
Oct 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=01f93d5e36753fc4d06ec67f05ce78c9c6f2dd56
  2. Affected versionversion=4.14.157 <4.15
  3. Affected versionversion=4.19.87 <4.19.323
  4. Affected versionversion=4.20
  5. Affected versionversion=4.4.204 <4.5
  6. Affected versionversion=4.9.204 <4.10
  7. Affected versionversion=65cbd1279f4b999d56a838344a30642db24cd215
  8. Affected versionversion=6c150df9c2e80b5cf86f5a0d98beb7390ad63bfc <5245f109b4afb6595360d4c180d483a6d2009a59
  9. Affected versionversion=97e1db17bc1ef4c2e1789bc9323c7be44fba53f8
  10. Affected versionversion=cf76c78595ca87548ca5e45c862ac9e0949c4687 <39a88623af3f1c686bf6db1e677ed865ffe6fccc
  11. Affected versionversion=cf76c78595ca87548ca5e45c862ac9e0949c4687 <3f1ca6ba5452d53c598a45d21267a2c0c221eef3
  12. Affected versionversion=cf76c78595ca87548ca5e45c862ac9e0949c4687 <81aba693b129e82e11bb54f569504d943d018de9
  13. Affected versionversion=cf76c78595ca87548ca5e45c862ac9e0949c4687 <84543da867c967edffd5065fa910ebf56aaae49d
  14. Affected versionversion=cf76c78595ca87548ca5e45c862ac9e0949c4687 <9753bcb17b36c9add9b32c61766ddf8d2d161911
  15. Affected versionversion=cf76c78595ca87548ca5e45c862ac9e0949c4687 <c03a82b4a0c935774afa01fd6d128b444fd930a1
  16. Affected versionversion=cf76c78595ca87548ca5e45c862ac9e0949c4687 <df4f20fc3673cee11abf2c571987a95733cb638d
  17. Affected versionversion=cf76c78595ca87548ca5e45c862ac9e0949c4687 <f55a33fe0fb5274ef185fd61947cf142138958af

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=01f93d5e36753fc4d06ec67f05ce78c9c6f2dd56; version=4.14.157 <4.15; version=4.19.87 <4.19.323; version=4.20; version=4.4.204 <4.5; version=4.9.204 <4.10; version=65cbd1279f4b999d56a838344a30642db24cd215; version=6c150df9c2e80b5cf86f5a0d98beb7390ad63bfc <5245f109b4afb6595360d4c180d483a6d2009a59; version=97e1db17bc1ef4c2e1789bc9323c7be44fba53f8; version=cf76c78595ca87548ca5e45c862ac9e0949c4687 <39a88623af3f1c686bf6db1e677ed865ffe6fccc; version=cf76c78595ca87548ca5e45c862ac9e0949c4687 <3f1ca6ba5452d53c598a45d21267a2c0c221eef3; version=cf76c78595ca87548ca5e45c862ac9e0949c4687 <81aba693b129e82e11bb54f569504d943d018de9; version=cf76c78595ca87548ca5e45c862ac9e0949c4687 <84543da867c967edffd5065fa910ebf56aaae49d; version=cf76c78595ca87548ca5e45c862ac9e0949c4687 <9753bcb17b36c9add9b32c61766ddf8d2d161911; version=cf76c78595ca87548ca5e45c862ac9e0949c4687 <c03a82b4a0c935774afa01fd6d128b444fd930a1; version=cf76c78595ca87548ca5e45c862ac9e0949c4687 <df4f20fc3673cee11abf2c571987a95733cb638d; version=cf76c78595ca87548ca5e45c862ac9e0949c4687 <f55a33fe0fb5274ef185fd61947cf142138958af

Published CVSS scores

7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5OracleCVSS: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 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 exploitPublished

Weakness, pattern, technique

CWE-667Improper Locking
T1499.004Endpoint Denial of Service Application or System Exploitation

Public exploit references

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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