smb: client: harden POSIX SID length parsing (Linux Linux)

CVE-2026-64380
HIGH 8.2

En bref

Source
NVD
EPSS
EPSS 0.44 % · centile 39 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: harden POSIX SID length parsing posix_info_sid_size() reads sid[1] to obtain the subauthority count, but its existing boundary check still accepts buffers with only one remaining byte. Require two bytes before reading sid[1] so all client paths that reuse the helper reject truncated POSIX SIDs safely.

Faiblesses (CWE)

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:HLinux
CVSS 3.1HIGH 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 349e13ad30b45998bb9937cfe0b32be6f951976d < 171605aed68380c2fa75dff9b3a1ed427c50065b ; affected 349e13ad30b45998bb9937cfe0b32be6f951976d < 4213c1208978483021d7d125c131de3985d38f61 ; affected 349e13ad30b45998bb9937cfe0b32be6f951976d < 96e889bc1e759c83f25093e8c2f3da31b4973f30 ; affected 349e13ad30b45998bb9937cfe0b32be6f951976d < 0de5b8e76847f5de26f364a82c6602c4881c30da ; affected 349e13ad30b45998bb9937cfe0b32be6f951976d < 427eb7eb46425fec845a43e861f3d6e2899cae59 ; affected 349e13ad30b45998bb9937cfe0b32be6f951976d < 86c5d470f5d42e61123b2f4b4f0b91f4eee5b980
Linux · Linuxaffected 5.7 ; unaffected 0 < 5.7 ; unaffected 5.10.261 ≤ 5.10.* ; unaffected 5.15.212 ≤ 5.15.* ; unaffected 6.1.178 ≤ 6.1.* ; unaffected 6.6.145 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD