High 7.1Published Oct 1, 2025

CVE-2025-39902mm/slub: avoid accessing metadata when pointer is invalid in object_err()

Updated under an hour ago (Oct 27, 2026, 2:50 AM ET)

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It affects Linux and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	81819f0fc8285a2a5a921c019e3e3d7b6169d225 builds before 872f2c34ff232af1e65ad2df86d61163c8ffad42; from 81819f0fc8285a2a5a921c019e3e3d7b6169d225 before f66012909e7bf383fcdc5850709ed5716073fdc4; 81819f0fc8285a2a5a921c019e3e3d7b6169d225 builds before 7e287256904ee796c9477e3ec92b07f236481ef3; 81819f0fc8285a2a5a921c019e3e3d7b6169d225 builds before 1f0797f17927b5cad0fb7eced422f9a7c30a3191; 81819f0fc8285a2a5a921c019e3e3d7b6169d225 builds before 0ef7058b4dc6fcef622ac23b45225db57f17b83f; from 81819f0fc8285a2a5a921c019e3e3d7b6169d225 before dda6ec365ab04067adae40ef17015db447e90736; 81819f0fc8285a2a5a921c019e3e3d7b6169d225 builds before 3baa1da473e6e50281324ff1d332d1a07a3bb02e; from 81819f0fc8285a2a5a921c019e3e3d7b6169d225 before b4efccec8d06ceb10a7d34d7b1c449c569d53770	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.22 before 5.4.299; from 5.5 before 5.10.243; from 5.11 before 5.15.192; from 5.16 before 6.1.151; from 6.2 before 6.6.105; from 6.7 before 6.12.46; from 6.13 before 6.16.6; 6.17; and 3 more ranges	NVD
debian debian_linux debian:debian_linux	11.0	NVD

References

References

https://git.kernel.org/stable/c/872f2c34ff232af1e65ad2df86d61163c8ffad42	patch
https://git.kernel.org/stable/c/f66012909e7bf383fcdc5850709ed5716073fdc4	patch
https://git.kernel.org/stable/c/7e287256904ee796c9477e3ec92b07f236481ef3	patch
https://git.kernel.org/stable/c/1f0797f17927b5cad0fb7eced422f9a7c30a3191	patch
https://git.kernel.org/stable/c/0ef7058b4dc6fcef622ac23b45225db57f17b83f	patch
https://git.kernel.org/stable/c/dda6ec365ab04067adae40ef17015db447e90736	patch
https://git.kernel.org/stable/c/3baa1da473e6e50281324ff1d332d1a07a3bb02e	patch
https://git.kernel.org/stable/c/b4efccec8d06ceb10a7d34d7b1c449c569d53770	patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	third-party-advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.