7.8

CVE-2026-23223

xfs: fix UAF in xchk_btree_check_block_owner

In the Linux kernel, the following vulnerability has been resolved:

xfs: fix UAF in xchk_btree_check_block_owner

We cannot dereference bs->cur when trying to determine if bs->cur
aliases bs->sc->sa.{bno,rmap}_cur after the latter has been freed.
Fix this by sampling before type before any freeing could happen.
The correct temporal ordering was broken when we removed xfs_btnum_t.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.9 < 6.12.72
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.11
Linux ≫ Linux Kernel Version >= 6.19 < 6.19.1
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.021
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/1d411278dda293a507cb794db7d9ed3511c685c6
Patch
https://git.kernel.org/stable/c/ed82e7949f5cac3058f4100f3cd670531d41a266
Patch
https://git.kernel.org/stable/c/ba5264610423d9653aa36920520902d83841bcfd
Patch
https://git.kernel.org/stable/c/1c253e11225bc5167217897885b85093e17c2217
Patch