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rtmutex: Use waiter::task instead of current in remove_waiter() (Linux Linux)

CVE-2026-43499
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.89 % · centile 59 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Rechercher sur…

Description

In the Linux kernel, the following vulnerability has been resolved: rtmutex: Use waiter::task instead of current in remove_waiter() remove_waiter() is used by the slowlock paths, but it is also used for proxy-lock rollback in rt_mutex_start_proxy_lock() when invoked from futex_requeue(). In the latter case waiter::task is not current, but remove_waiter() operates on current for the dequeue operation. That results in several problems: 1) the rbtree dequeue happens without waiter::task::pi_lock being held 2) the waiter task's pi_blocked_on state is not cleared, which leaves a dangling pointer primed for UAF around. 3) rt_mutex_adjust_prio_chain() operates on the wrong top priority waiter task Use waiter::task instead of current in all related operations in remove_waiter() to cure those problems. [ tglx: Fixup rt_mutex_adjust_prio_chain(), add a comment and amend the changelog ]

Faiblesses (CWE)

  • CWE-416 — Utilisation après libération

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 8161239a8bcce9ad6b537c04a1fa3b5c68bae693 < f3fa3424bceb128d2be4b3745506b22844b87db7 ; affected 8161239a8bcce9ad6b537c04a1fa3b5c68bae693 < 838ce5cb5d93c3ab8b27e75bc6ad905a94b752fd ; affected 8161239a8bcce9ad6b537c04a1fa3b5c68bae693 < d8cce4773c2b23d819baf5abedc62f7b430e8745 ; affected 8161239a8bcce9ad6b537c04a1fa3b5c68bae693 < 8a1fc8d698ac5e5916e3082a0f74450d71f9611f ; affected 8161239a8bcce9ad6b537c04a1fa3b5c68bae693 < 6d52dfcb2a5db86e346cf51f8fcf2071b8085166 ; affected 8161239a8bcce9ad6b537c04a1fa3b5c68bae693 < 3fb7394a837740770f0d6b4b30567e60786a63f2
Linux · Linuxaffected 2.6.39 ; unaffected 0 < 2.6.39 ; unaffected 5.10.261 ≤ 5.10.* ; unaffected 5.15.212 ≤ 5.15.* ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.140 ≤ 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