ipv6: fix possible infinite loop in fib6_select_path() (Linux Linux)

CVE-2026-63968
HIGH 7.5

En bref

Source
NVD
EPSS
EPSS 0.66 % · centile 52 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible infinite loop in fib6_select_path() Found while auditing the same pattern Sashiko reported in rt6_fill_node() [1]. Apply the same fix as commit f8d8ce1b515a ("ipv6: fix possible infinite loop in fib6_info_uses_dev()"). Writers holding tb6_lock can list_del_rcu(&first->fib6_siblings) without waiting for RCU readers; first->fib6_siblings.next then still points into the old ring and this softirq-side walker never reaches &first->fib6_siblings as its terminator. fib6_purge_rt() always WRITE_ONCE()s first->fib6_nsiblings to 0 before list_del_rcu(), so an inside-loop check is a reliable detach signal. [1] https://sashiko.dev/#/patchset/20260526020227.4857-1-jiayuan.chen%40linux.dev

Faiblesses (CWE)

  • CWE-835 — Boucle dont la condition de sortie est inatteignable (boucle infinie)

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HLinux
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2 < 3948a7d92f7678e89e1776bb2d169afcad63b1ae ; affected 52da02521ede55fb86546c3fffd9377b3261b91f < c87cd3cb309634bc8f50a54e2079424f219ac21f ; affected 34a949e7a0869dfa31a40416d2a56973fae1807b < 0f7b73c3452635de83b8711b31abdda8e49aad7b ; affected d9ccb18f83ea2bb654289b6ecf014fd267cc988b < ab9a10969a907b472a0196d999c08ff7144172e3 ; affected d9ccb18f83ea2bb654289b6ecf014fd267cc988b < 9b9d5bd6e3d4c9cecab5407604b690684b2532d2 ; affected d9ccb18f83ea2bb654289b6ecf014fd267cc988b < 9c7da87c2dc860bb17ca1ece942495d28b1ce3b9
Linux · Linuxaffected 6.13 ; unaffected 0 < 6.13 ; unaffected 6.1.176 ≤ 6.1.* ; unaffected 6.6.143 ≤ 6.6.* ; unaffected 6.12.93 ≤ 6.12.* ; unaffected 6.18.35 ≤ 6.18.*

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