CVE-2023-52600

Kernel memory corruption via stale JFS inode pointer

Published Mar 6, 2024 · Updated Aug 5, 2026

Use-after-free in the JFS mount path in Linux before 6.8 allows local users to trigger stale kernel-memory access via a failed JFS mount. When diMount(ipimap) fails, jfs_evict_inode leaves sbi->ipimap pointing to an object that RCU later frees, and diFreeSpecial dereferences it. Reaching the flaw requires low-privilege local access and a JFS mount failure; published sources do not demonstrate a specific crash or privilege gain.

CVSS severity7.8
High
EPSS probability0.28%
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 the JFS mount path in Linux before 6.8 allows local users to trigger stale kernel-memory access via a failed JFS mount. When diMount(ipimap) fails, jfs_evict_inode leaves sbi->ipimap pointing to an object that RCU later frees, and diFreeSpecial dereferences it. Reaching the flaw requires low-privilege local access and a JFS mount failure; published sources do not demonstrate a specific crash or privilege gain.

The record

CVE
CVE-2023-52600
Published
Mar 6, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
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 <1696d6d7d4a1b373e96428d0fe1166bd7c3c795e
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <32e8f2d95528d45828c613417cb2827d866cbdce
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <81b4249ef37297fb17ba102a524039a05c6c5d35
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8e44dc3f96e903815dab1d74fff8faafdc6feb61
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <93df0a2a0b3cde2d7ab3a52ed46ea1d6d4aaba5f
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bacdaa04251382d7efd4f09f9a0686bfcc297e2e
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bc6ef64dbe71136f327d63b2b9071b828af2c2a8
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e0e1958f4c365e380b17ccb35617345b31ef7bf3
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1696d6d7d4a1b373e96428d0fe1166bd7c3c795e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <32e8f2d95528d45828c613417cb2827d866cbdce; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <81b4249ef37297fb17ba102a524039a05c6c5d35; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8e44dc3f96e903815dab1d74fff8faafdc6feb61; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <93df0a2a0b3cde2d7ab3a52ed46ea1d6d4aaba5f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bacdaa04251382d7efd4f09f9a0686bfcc297e2e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bc6ef64dbe71136f327d63b2b9071b828af2c2a8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e0e1958f4c365e380b17ccb35617345b31ef7bf3; version=2.6.12

Published CVSS scores

7.8NIST NVDCVSS: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

CWE-416Use After Free

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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