CVE-2023-52601

Kernel out-of-bounds access via unchecked JFS tree index

Published Mar 6, 2024 · Updated Aug 5, 2026

Out-of-bounds access in the Linux kernel JFS implementation allows local users to trigger a kernel memory violation through JFS tree processing. The dbAdjTree function indexes dmt_stree without first validating the index against the applicable control-tree or ordinary-tree size. Reaching the flaw requires low-privileged local access and processing of a crafted JFS image; published evidence confirms the bounds violation but not code execution.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in the Linux kernel JFS implementation allows local users to trigger a kernel memory violation through JFS tree processing. The dbAdjTree function indexes dmt_stree without first validating the index against the applicable control-tree or ordinary-tree size. Reaching the flaw requires low-privileged local access and processing of a crafted JFS image; published evidence confirms the bounds violation but not code execution.

The record

CVE
CVE-2023-52601
Published
Mar 6, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-129, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 6, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2037cb9d95f1741885f7daf50e8a028c4ade5317
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2e16a1389b5a7983b45cb2aa20b0e3f0ee364d6c
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3d3898b4d72c677d47fe3cb554449f2df5c12555
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3f8217c323fd6ecd6829a0c3ae7ac3f14eac368e
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <70780914cb57e2ba711e0ac1b677aaaa75103603
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <74ecdda68242b174920fe7c6133a856fb7d8559b
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8393c80cce45f40c1256d72e21ad351b3650c57e
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fc67a2e18f4c4e3f07e9f9ae463da24530470e73
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2037cb9d95f1741885f7daf50e8a028c4ade5317; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2e16a1389b5a7983b45cb2aa20b0e3f0ee364d6c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3d3898b4d72c677d47fe3cb554449f2df5c12555; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3f8217c323fd6ecd6829a0c3ae7ac3f14eac368e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <70780914cb57e2ba711e0ac1b677aaaa75103603; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <74ecdda68242b174920fe7c6133a856fb7d8559b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8393c80cce45f40c1256d72e21ad351b3650c57e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fc67a2e18f4c4e3f07e9f9ae463da24530470e73; version=2.6.12
The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f4 <2037cb9d95f1; version=1da177e4c3f4 <2e16a1389b5a; version=1da177e4c3f4 <3d3898b4d72c; version=1da177e4c3f4 <3f8217c323fd; version=1da177e4c3f4 <70780914cb57; version=1da177e4c3f4 <74ecdda68242; version=1da177e4c3f4 <8393c80cce45; version=1da177e4c3f4 <fc67a2e18f4c

Published CVSS scores

7.8CISA-ADPCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-129Improper Validation of Array Index
T1068Exploitation for Privilege Escalation

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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