ksmbd: validate EaNameLength in smb2_get_ea() (Linux Linux)

CVE-2026-31612
HIGH 7.5

En bref

Source
NVD
EPSS
EPSS 0.43 % · centile 37 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate EaNameLength in smb2_get_ea() smb2_get_ea() reads ea_req->EaNameLength from the client request and passes it directly to strncmp() as the comparison length without verifying that the length of the name really is the size of the input buffer received. Fix this up by properly checking the size of the name based on the value received and the overall size of the request, to prevent a later strncmp() call to use the length as a "trusted" size of the buffer. Without this check, uninitialized heap values might be slowly leaked to the client.

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NLinux
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 859f11e1bc81a4d32bb3ceeae54bcd296ac675d3 ; affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 4b73376feecb3b61172fe5b4ff42bbbb8531669d ; affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 551dfb15b182abad4600eaf7b37e6eb7000d5b1b ; affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 3363a770b193f555f29d76ddf4ced3305c0ccf6d ; affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 243b206bcb5a7137e8bddd57b2eec81e1ebd3859 ; affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < dfc6878d14acafffbe670bf2576620757a10a3d8
Linux · Linuxaffected 5.15 ; unaffected 0 < 5.15 ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.136 ≤ 6.6.* ; unaffected 6.12.83 ≤ 6.12.* ; unaffected 6.18.24 ≤ 6.18.*

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