xfrm: prevent policy_hthresh.work from racing with netns teardown (Linux Linux)

CVE-2026-31516
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.10 % · centile 1 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: prevent policy_hthresh.work from racing with netns teardown A XFRM_MSG_NEWSPDINFO request can queue the per-net work item policy_hthresh.work onto the system workqueue. The queued callback, xfrm_hash_rebuild(), retrieves the enclosing struct net via container_of(). If the net namespace is torn down before that work runs, the associated struct net may already have been freed, and xfrm_hash_rebuild() may then dereference stale memory. xfrm_policy_fini() already flushes policy_hash_work during teardown, but it does not synchronize policy_hthresh.work. Synchronize policy_hthresh.work in xfrm_policy_fini() as well, so the queued work cannot outlive the net namespace teardown and access a freed struct net.

Faiblesses (CWE)

  • CWE-416 — Utilisation après libération
  • CWE-362 — Situation de compétition

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 880a6fab8f6ba5b5abe59ea68533202ddea1012c < 56ea2257b83ee29a543f158159e3d1abc1e3e4fe ; affected 880a6fab8f6ba5b5abe59ea68533202ddea1012c < 8854e9367465d784046362698731c1111e3b39b8 ; affected 880a6fab8f6ba5b5abe59ea68533202ddea1012c < 4e2e77843fef473ef47e322d52436d8308582a96 ; affected 880a6fab8f6ba5b5abe59ea68533202ddea1012c < 29fe3a61bcdce398ee3955101c39f89c01a8a77e
Linux · Linuxaffected 3.18 ; unaffected 0 < 3.18 ; unaffected 6.12.80 ≤ 6.12.* ; unaffected 6.18.21 ≤ 6.18.* ; unaffected 6.19.11 ≤ 6.19.* ; unaffected 7.0 ≤ *

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