PT-2026-20449 · Linux · Linux Kernel

Publicado 2026-01-01 · Atualizado 2026-03-25 · CVE-2026-23223

Positive Technologies (AI Summary)

CVSS v3.1

7.8

Alta

Vetor base

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The Linux kernel contains a use-after-free issue within the xfs subsystem, specifically in the xchk btree check block owner function. The issue arises from a potential dereference of bs->cur after the memory it points to has been freed, specifically when checking if bs->cur aliases bs->sc->sa.{bno,rmap} cur. The fix involves sampling before type to ensure correct temporal ordering and prevent the dereference after freeing.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Use After Free

Enumeração de Fraquezas

CWE-416

Identificadores relacionados

CVE-2026-23223

ECHO-5BE4-FE6A-842F

OPENSUSE-SU-2026:10387-1

OPENSUSE-SU-2026:20416-1

SUSE-SU-2026:20838-1

SUSE-SU-2026:20931-1

SUSE-SU-2026:21284-1

Produtos afetados

Linux Kernel

Referências · 419

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23223.json · Exploit
• https://suse.com/security/cve/CVE-2026-23121 · Nota
• https://bugzilla.suse.com/1258317 · Nota
• https://suse.com/security/cve/CVE-2026-23179 · Nota
• https://bugzilla.suse.com/1258252 · Nota
• https://bugzilla.suse.com/1257716 · Nota
• https://bugzilla.suse.com/1258468 · Nota
• https://bugzilla.suse.com/1257749 · Nota
• https://suse.com/security/cve/CVE-2026-23024 · Nota
• https://suse.com/security/cve/CVE-2026-23018 · Nota
• https://suse.com/security/cve/CVE-2025-71071 · Nota
• https://suse.com/security/cve/CVE-2025-71192 · Nota
• https://bugzilla.suse.com/1257745 · Nota
• https://git.kernel.org/stable/c/1d411278dda293a507cb794db7d9ed3511c685c6 · Correção
• https://suse.com/security/cve/CVE-2026-23171 · Nota