CVE-2024-36957

Kernel crash via off-by-one userspace read

Published May 30, 2024 · Updated May 23, 2026

Off-by-one error in Linux octeontx2 AF debugfs code allows local users to crash the kernel through a crafted debugfs write. The rvu_debugfs.c write path passes count + 1 to memdup_user although access checks cover only count user-supplied bytes, causing a one-byte over-read. Reachability requires local access to the affected debugfs interface on a system using the Marvell OcteonTX2 AF driver; the bounded reported consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Off-by-one error in Linux octeontx2 AF debugfs code allows local users to crash the kernel through a crafted debugfs write. The rvu_debugfs.c write path passes count + 1 to memdup_user although access checks cover only count user-supplied bytes, causing a one-byte over-read. Reachability requires local access to the affected debugfs interface on a system using the Marvell OcteonTX2 AF driver; the bounded reported consequence is a kernel crash.

The record

CVE
CVE-2024-36957
Published
May 30, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-193, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=3a2eb515d1367c0f667b76089a6e727279c688b8 <0a0285cee11c7dcc2657bcd456e469958a5009e7
  2. Affected versionversion=3a2eb515d1367c0f667b76089a6e727279c688b8 <8f11fe3ea3fc261640cfc8a5addd838000407c67
  3. Affected versionversion=3a2eb515d1367c0f667b76089a6e727279c688b8 <ec697fbd38cbe2eef0948b58673b146caa95402f
  4. Affected versionversion=3a2eb515d1367c0f667b76089a6e727279c688b8 <f299ee709fb45036454ca11e90cb2810fe771878
  5. Affected versionversion=3a2eb515d1367c0f667b76089a6e727279c688b8 <fc3e0076c1f82fe981d321e3a7bad4cbee542c19
  6. Affected versionversion=5.10.20 <5.10.217
  7. Affected versionversion=5.11.3 <5.12
  8. Affected versionversion=5.12
  9. Affected versionversion=c9a2ed3fdd037314a71e6a6ba5d99a3605f6f9c7
  10. Affected versionversion=dae49384d0d7695540e2d75168f323cef1384810 <bcdac70adceb44373da204c3c297f2a98e13216e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3a2eb515d1367c0f667b76089a6e727279c688b8 <0a0285cee11c7dcc2657bcd456e469958a5009e7; version=3a2eb515d1367c0f667b76089a6e727279c688b8 <8f11fe3ea3fc261640cfc8a5addd838000407c67; version=3a2eb515d1367c0f667b76089a6e727279c688b8 <ec697fbd38cbe2eef0948b58673b146caa95402f; version=3a2eb515d1367c0f667b76089a6e727279c688b8 <f299ee709fb45036454ca11e90cb2810fe771878; version=3a2eb515d1367c0f667b76089a6e727279c688b8 <fc3e0076c1f82fe981d321e3a7bad4cbee542c19; version=5.10.20 <5.10.217; version=5.11.3 <5.12; version=5.12; version=c9a2ed3fdd037314a71e6a6ba5d99a3605f6f9c7; version=dae49384d0d7695540e2d75168f323cef1384810 <bcdac70adceb44373da204c3c297f2a98e13216e

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-193Off-by-one Error
T1499Endpoint Denial of Service

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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