5.5

CVE-2025-39902

mm/slub: avoid accessing metadata when pointer is invalid in object_err()

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 2.6.22 < 5.4.299
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.243
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.192
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.151
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.105
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.46
Linux ≫ Linux Kernel Version >= 6.13 < 6.16.6
Linux ≫ Linux Kernel Version 6.17 Update rc1
Linux ≫ Linux Kernel Version 6.17 Update rc2
Linux ≫ Linux Kernel Version 6.17 Update rc3
Linux ≫ Linux Kernel Version 6.17 Update rc4
Debian ≫ Debian Linux Version 11.0
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.15% 0.049
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.1 1.8 5.2
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/0ef7058b4dc6fcef622ac23b45225db57f17b83f
Patch
https://git.kernel.org/stable/c/1f0797f17927b5cad0fb7eced422f9a7c30a3191
Patch
https://git.kernel.org/stable/c/3baa1da473e6e50281324ff1d332d1a07a3bb02e
Patch
https://git.kernel.org/stable/c/7e287256904ee796c9477e3ec92b07f236481ef3
Patch
https://git.kernel.org/stable/c/872f2c34ff232af1e65ad2df86d61163c8ffad42
Patch
https://git.kernel.org/stable/c/b4efccec8d06ceb10a7d34d7b1c449c569d53770
Patch
https://git.kernel.org/stable/c/dda6ec365ab04067adae40ef17015db447e90736
Patch
https://git.kernel.org/stable/c/f66012909e7bf383fcdc5850709ed5716073fdc4
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