CVE-2025-39902 (GCVE-0-2025-39902)

Vulnerability from cvelistv5 – Published: 2025-10-01 07:42 – Updated: 2025-11-03 17:44
VLAI?
Title
mm/slub: avoid accessing metadata when pointer is invalid in object_err()
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/slub: avoid accessing metadata when pointer is invalid in object_err() object_err() reports details of an object for further debugging, such as the freelist pointer, redzone, etc. However, if the pointer is invalid, attempting to access object metadata can lead to a crash since it does not point to a valid object. One known path to the crash is when alloc_consistency_checks() determines the pointer to the allocated object is invalid because of a freelist corruption, and calls object_err() to report it. The debug code should report and handle the corruption gracefully and not crash in the process. In case the pointer is NULL or check_valid_pointer() returns false for the pointer, only print the pointer value and skip accessing metadata.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < 872f2c34ff232af1e65ad2df86d61163c8ffad42 (git)
Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < f66012909e7bf383fcdc5850709ed5716073fdc4 (git)
Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < 7e287256904ee796c9477e3ec92b07f236481ef3 (git)
Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < 1f0797f17927b5cad0fb7eced422f9a7c30a3191 (git)
Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < 0ef7058b4dc6fcef622ac23b45225db57f17b83f (git)
Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < dda6ec365ab04067adae40ef17015db447e90736 (git)
Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < 3baa1da473e6e50281324ff1d332d1a07a3bb02e (git)
Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < b4efccec8d06ceb10a7d34d7b1c449c569d53770 (git)
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    Linux Linux Affected: 2.6.22
Unaffected: 0 , < 2.6.22 (semver)
Unaffected: 5.4.299 , ≤ 5.4.* (semver)
Unaffected: 5.10.243 , ≤ 5.10.* (semver)
Unaffected: 5.15.192 , ≤ 5.15.* (semver)
Unaffected: 6.1.151 , ≤ 6.1.* (semver)
Unaffected: 6.6.105 , ≤ 6.6.* (semver)
Unaffected: 6.12.46 , ≤ 6.12.* (semver)
Unaffected: 6.16.6 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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