CVE-2026-74521

9.1 Critique

Publiée le 15/08/2026 à 15:17 · Modifiée le 03/10/2026 à 13:17 · Reçue · Source : 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use memcmp() to compare ClientGUIDs ClientGUID is a fixed-size binary value and can contain embedded NUL bytes. strncmp() stops comparing at the first NUL byte, so different ClientGUID values can incorrectly be treated as equal. Use memcmp() in SMB3 multichannel session binding and FSCTL_VALIDATE_NEGOTIATE_INFO to compare all SMB2_CLIENT_GUID_SIZE bytes.

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Produits concernés

Linux

Scores CVSS

Version	Score	Source	Vecteur
3.1	9.1 Critique	416baaa9-dc9f-4396-8d5f-8c081fb06d67	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`

Références

https://git.kernel.org/stable/c/5a0367bf5ce420be7b19936def2e90adcf32a683
https://git.kernel.org/stable/c/7bde6f181fa307d2cc1ec2b0313ac8e9811c8232
https://git.kernel.org/stable/c/a386c83043015a703e227775f778e40343f45911
https://git.kernel.org/stable/c/ba2a5b66f1d414eb8403d655f8813783892cfc85
https://git.kernel.org/stable/c/d535363299822c5caa543787b21bd5cfa3e41949
https://git.kernel.org/stable/c/e8bb506e6ef749ac0336f3e579d8d02396b7d832

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories