CVE-2024-39494

Kernel crash via unlocked IMA dentry name

Published Jul 12, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel IMA allows local users to crash the kernel by racing a measured file with a concurrent rename. IMA measurement code retains dentry->d_name.name without a stabilizing lock, so rename can free the name before strlen or memcpy uses it. Reaching the flaw requires local low-privileged access and an active IMA measurement policy; the stale read can disclose kernel heap data, corrupt measurement records, or crash the kernel.

CVSS severity7.8
High
EPSS probability0.31%
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 IMA allows local users to crash the kernel by racing a measured file with a concurrent rename. IMA measurement code retains dentry->d_name.name without a stabilizing lock, so rename can free the name before strlen or memcpy uses it. Reaching the flaw requires local low-privileged access and an active IMA measurement policy; the stale read can disclose kernel heap data, corrupt measurement records, or crash the kernel.

The record

CVE
CVE-2024-39494
Published
Jul 12, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 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=2fe5d6def1672ae6635dd71867bf36dcfaa7434b <0b31e28fbd773aefb6164687e0767319b8199829
  2. Affected versionversion=2fe5d6def1672ae6635dd71867bf36dcfaa7434b <480afcbeb7aaaa22677d3dd48ec590b441eaac1a
  3. Affected versionversion=2fe5d6def1672ae6635dd71867bf36dcfaa7434b <7fb374981e31c193b1152ed8d3b0a95b671330d4
  4. Affected versionversion=2fe5d6def1672ae6635dd71867bf36dcfaa7434b <a78a6f0da57d058e2009e9958fdcef66f165208c
  5. Affected versionversion=2fe5d6def1672ae6635dd71867bf36dcfaa7434b <be84f32bb2c981ca670922e047cdde1488b233de
  6. Affected versionversion=2fe5d6def1672ae6635dd71867bf36dcfaa7434b <dd431c3ac1fc34a9268580dd59ad3e3c76b32a8c
  7. Affected versionversion=2fe5d6def1672ae6635dd71867bf36dcfaa7434b <edf287bc610b18d7a9c0c0c1cb2e97b9348c71bb
  8. Affected versionversion=3.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2fe5d6def1672ae6635dd71867bf36dcfaa7434b <0b31e28fbd773aefb6164687e0767319b8199829; version=2fe5d6def1672ae6635dd71867bf36dcfaa7434b <480afcbeb7aaaa22677d3dd48ec590b441eaac1a; version=2fe5d6def1672ae6635dd71867bf36dcfaa7434b <7fb374981e31c193b1152ed8d3b0a95b671330d4; version=2fe5d6def1672ae6635dd71867bf36dcfaa7434b <a78a6f0da57d058e2009e9958fdcef66f165208c; version=2fe5d6def1672ae6635dd71867bf36dcfaa7434b <be84f32bb2c981ca670922e047cdde1488b233de; version=2fe5d6def1672ae6635dd71867bf36dcfaa7434b <dd431c3ac1fc34a9268580dd59ad3e3c76b32a8c; version=2fe5d6def1672ae6635dd71867bf36dcfaa7434b <edf287bc610b18d7a9c0c0c1cb2e97b9348c71bb; version=3.7

Published CVSS scores

5.5OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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

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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

No sourced classifications are available.

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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