CVE-2024-42077

Kernel panic via OCFS2 transaction-credit exhaustion

Published Jul 29, 2024 · Updated May 11, 2026

Transaction-credit exhaustion in Linux OCFS2 allows local users to trigger a filesystem abort and kernel panic through direct I/O. ocfs2_dio_end_io_write() uses ocfs2_calc_extend_credits() without accounting for arbitrarily large I/O containing many extents, so repeated ocfs2_replace_extent_rec() calls can consume all journal credits. The failure requires write access to a heavily fragmented OCFS2 filesystem and a direct-I/O request spanning many single-block extents; the bounded consequence is an OCFS2 abort and possible host crash.

CVSS severityUnavailable
Unscored
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

Transaction-credit exhaustion in Linux OCFS2 allows local users to trigger a filesystem abort and kernel panic through direct I/O. ocfs2_dio_end_io_write() uses ocfs2_calc_extend_credits() without accounting for arbitrarily large I/O containing many extents, so repeated ocfs2_replace_extent_rec() calls can consume all journal credits. The failure requires write access to a heavily fragmented OCFS2 filesystem and a direct-I/O request spanning many single-block extents; the bounded consequence is an OCFS2 abort and possible host crash.

The record

CVE
CVE-2024-42077
Published
Jul 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jul 29, 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=4.6
  2. Affected versionversion=c15471f79506830f80eca0e7fe09b8213953ab5f <320273b5649bbcee87f9e65343077189699d2a7a
  3. Affected versionversion=c15471f79506830f80eca0e7fe09b8213953ab5f <331d1079d58206ff7dc5518185f800b412f89bc6
  4. Affected versionversion=c15471f79506830f80eca0e7fe09b8213953ab5f <9ea2d1c6789722d58ec191f14f9a02518d55b6b4
  5. Affected versionversion=c15471f79506830f80eca0e7fe09b8213953ab5f <a68b896aa56e435506453ec8835bc991ec3ae687
  6. Affected versionversion=c15471f79506830f80eca0e7fe09b8213953ab5f <be346c1a6eeb49d8fda827d2a9522124c2f72f36
  7. Affected versionversion=c15471f79506830f80eca0e7fe09b8213953ab5f <c05ffb693bfb42a48ef3ee88a55b57392984e111

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.6; version=c15471f79506830f80eca0e7fe09b8213953ab5f <320273b5649bbcee87f9e65343077189699d2a7a; version=c15471f79506830f80eca0e7fe09b8213953ab5f <331d1079d58206ff7dc5518185f800b412f89bc6; version=c15471f79506830f80eca0e7fe09b8213953ab5f <9ea2d1c6789722d58ec191f14f9a02518d55b6b4; version=c15471f79506830f80eca0e7fe09b8213953ab5f <a68b896aa56e435506453ec8835bc991ec3ae687; version=c15471f79506830f80eca0e7fe09b8213953ab5f <be346c1a6eeb49d8fda827d2a9522124c2f72f36; version=c15471f79506830f80eca0e7fe09b8213953ab5f <c05ffb693bfb42a48ef3ee88a55b57392984e111

Published CVSS scores

No CVSS assessment is available in this record.

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
PrivilegesUnavailable
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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