smb: client: require net admin for CIFS SWN netlink (Linux Linux)

CVE-2026-64137
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.13 % · centile 3 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: require net admin for CIFS SWN netlink CIFS_GENL_CMD_SWN_NOTIFY is the userspace witness-notify command. The intended sender is the cifs.witness helper, but the generic-netlink operation currently has no capability flag, so any local process can send RESOURCE_CHANGE or CLIENT_MOVE notifications to the in-kernel witness handler. The same family exposes CIFS_GENL_MCGRP_SWN without multicast-group capability flags. Register messages sent to that group include the witness registration id and, for NTLM-authenticated mounts, the username, domain, and password attributes copied from the CIFS session. An unprivileged local process should not be able to join that group and receive those messages. Require CAP_NET_ADMIN for incoming SWN_NOTIFY commands with GENL_ADMIN_PERM, and require CAP_NET_ADMIN over the network namespace for joining the SWN multicast group with GENL_MCAST_CAP_NET_ADMIN. The cifs.witness service runs with the privileges needed for both operations.

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected fed979a7e082bd9f25f9002c3c4f8740dacd0bc8 < 9cf7eb8919344932f909b2fac76296f7656fda8d ; affected fed979a7e082bd9f25f9002c3c4f8740dacd0bc8 < 9919021a3b7974ae66a5f9915e3a48c10cfd409b ; affected fed979a7e082bd9f25f9002c3c4f8740dacd0bc8 < 969bc6370334a5b4720c5470783295d6484bbc95 ; affected fed979a7e082bd9f25f9002c3c4f8740dacd0bc8 < a3238b09c58f323e40743ce174cd0ab81b5c09ed ; affected fed979a7e082bd9f25f9002c3c4f8740dacd0bc8 < a8d17d22db591099519a89f14dd24810daba74c3 ; affected fed979a7e082bd9f25f9002c3c4f8740dacd0bc8 < c2397b93fbb6f44a788fff30f99be2c20cc5e50f
Linux · Linuxaffected 5.11 ; unaffected 0 < 5.11 ; unaffected 5.15.210 ≤ 5.15.* ; unaffected 6.1.176 ≤ 6.1.* ; unaffected 6.6.143 ≤ 6.6.* ; unaffected 6.12.92 ≤ 6.12.*

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