CVE-2023-52604

Kernel compromise via unchecked JFS tree index

Published Mar 6, 2024 · Updated Aug 5, 2026

An out-of-bounds access in JFS on affected Linux kernels allows local users to crash the kernel through a crafted filesystem image. dbAdjTree uses an attacker-controlled leaf-derived lp value to read and write dmt_stree without first ensuring that the index is below CTLTREESIZE. A local session capable of mounting the image and freeing or truncating files can corrupt kernel memory, disclose adjacent memory, or interrupt the system.

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

An out-of-bounds access in JFS on affected Linux kernels allows local users to crash the kernel through a crafted filesystem image. dbAdjTree uses an attacker-controlled leaf-derived lp value to read and write dmt_stree without first ensuring that the index is below CTLTREESIZE. A local session capable of mounting the image and freeing or truncating files can corrupt kernel memory, disclose adjacent memory, or interrupt the system.

The record

CVE
CVE-2023-52604
Published
Mar 6, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
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

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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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <42f433785f108893de0dd5260bafb85d7d51db03
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <59342822276f753e49d27ef5eebffbba990572b9
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6a44065dd604972ec1fbcccbdc4a70d266a89cdd
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6fe8b702125aeee6ce83f20092a2341446704e7b
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9862ec7ac1cbc6eb5ee4a045b5d5b8edbb2f7e68
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <98f9537fe61b8382b3cc5dd97347531698517c56
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <de34de6e57bbbc868e4fcf9e98c76b3587cabb0b
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e3e95c6850661c77e6dab079d9b5374a618ebb15
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <42f433785f108893de0dd5260bafb85d7d51db03; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <59342822276f753e49d27ef5eebffbba990572b9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6a44065dd604972ec1fbcccbdc4a70d266a89cdd; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6fe8b702125aeee6ce83f20092a2341446704e7b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9862ec7ac1cbc6eb5ee4a045b5d5b8edbb2f7e68; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <98f9537fe61b8382b3cc5dd97347531698517c56; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <de34de6e57bbbc868e4fcf9e98c76b3587cabb0b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e3e95c6850661c77e6dab079d9b5374a618ebb15; version=2.6.12

Published CVSS scores

7.8Linux kernel CVE teamCVSS: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.

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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

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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