keys: Pin request_key_auth payload in instantiate paths (Linux Linux)

CVE-2026-63823
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.16 % · centile 5 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: keys: Pin request_key_auth payload in instantiate paths A: request_key() B: KEYCTL_INSTANTIATE_IOV ================ ========================= create auth key store rka in auth key wait for helper get auth key load rka from auth key copy user payload sleep on #PF helper completed detach and free rka destroy auth key wake up use rka->target_key **USE-AFTER-FREE** Give request_key_auth payloads a refcount. Take a payload reference while authkey->sem stabilizes the payload and revocation state. Hold that reference across the instantiate and reject paths. Drop the auth key owning reference from revoke and destroy. [jarkko: Replaced the first two paragraphs of text with an actual concurrency scenario.]

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 b5f545c880a2a47947ba2118b2509644ab7a2969 < d8274181b0f28d450b42489723a5ba81042158d7 ; affected b5f545c880a2a47947ba2118b2509644ab7a2969 < 4982bfabce6b33b3c9eddb4fb900fe5568b7cf91 ; affected b5f545c880a2a47947ba2118b2509644ab7a2969 < 708709c65a1832a99b0eef8ae46e343ddaca3d06 ; affected b5f545c880a2a47947ba2118b2509644ab7a2969 < 35ab4db86774d82389e4b9559e26ab7f68d8e395 ; affected b5f545c880a2a47947ba2118b2509644ab7a2969 < f9b68632ac93cc742f2e411021c4dbfe452ea0c2 ; affected b5f545c880a2a47947ba2118b2509644ab7a2969 < 7216ce8cb12fee44e309503955bb83806b106129
Linux · Linuxaffected 2.6.16 ; unaffected 0 < 2.6.16 ; unaffected 5.10.260 ≤ 5.10.* ; unaffected 5.15.211 ≤ 5.15.* ; unaffected 6.1.177 ≤ 6.1.* ; unaffected 6.6.144 ≤ 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