batman-adv: fix tp_meter counter underflow during shutdown (Linux Linux)

CVE-2026-52919
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.12 % · centile 2 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: fix tp_meter counter underflow during shutdown batadv_tp_sender_shutdown() unconditionally decrements the "sending" atomic counter. If multiple paths (e.g. timeout, user cancel, and normal finish) call this function, the counter can underflow to -1. Since the sender logic treats any non-zero value as "still sending", a negative value causes the sender kthread to loop indefinitely. This leads to a use-after-free when the interface is removed while the zombie thread is still active. Fix this by using atomic_xchg() to ensure the counter only transitions from 1 to 0 once. [sven: added missing change in batadv_tp_send]

Faiblesses (CWE)

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 33a3bb4a3345bb511f9c69c913da95d4693e2a4e < e75e2ab463b5b34df6b98f94d740aff327ce9f6b ; affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e < abae88fa254f2981d39ac003a7b302528a22af64 ; affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e < c66d20a3ff095e3f000551d208ec2606616db15c ; affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e < c1bac194733aabd731aafa6a01350c229e187dba ; affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e < 01cefc5923889e29dbb5f281c3d457714ceb9c00 ; affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e < 90ae3eae06b7b8ab9f6250b9497c860915b4c17b
Linux · Linuxaffected 4.8 ; unaffected 0 < 4.8 ; unaffected 5.10.258 ≤ 5.10.* ; unaffected 5.15.209 ≤ 5.15.* ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.142 ≤ 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