seg6: separate dst_cache for input and output paths in seg6 lwtunnel (Linux Linux)

CVE-2026-31668
CRITICAL 9.8

En bref

Source
NVD
EPSS
EPSS 0.44 % · centile 38 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: seg6: separate dst_cache for input and output paths in seg6 lwtunnel The seg6 lwtunnel uses a single dst_cache per encap route, shared between seg6_input_core() and seg6_output_core(). These two paths can perform the post-encap SID lookup in different routing contexts (e.g., ip rules matching on the ingress interface, or VRF table separation). Whichever path runs first populates the cache, and the other reuses it blindly, bypassing its own lookup. Fix this by splitting the cache into cache_input and cache_output, so each path maintains its own cached dst independently.

Faiblesses (CWE)

  • CWE-459 — Nettoyage incomplet

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/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 6c8702c60b88651072460f3f4026c7dfe2521d12 < 1dec91d3b1cefb82635761b7812154af3ef46449 ; affected 6c8702c60b88651072460f3f4026c7dfe2521d12 < 750569d6987a0ff46317a4b86eb3907e296287bf ; affected 6c8702c60b88651072460f3f4026c7dfe2521d12 < 57d0374d14fa667dec6952173b93e7e84486d5c9 ; affected 6c8702c60b88651072460f3f4026c7dfe2521d12 < 84d458018b147176b259347103fccb7e93abd2b1 ; affected 6c8702c60b88651072460f3f4026c7dfe2521d12 < 6305ad032b03d2ea4181b953a66e19a9a6ed053c ; affected 6c8702c60b88651072460f3f4026c7dfe2521d12 < fb56de5d99218de49d5d43ef3a99e062ecd0f9a1
Linux · Linuxaffected 4.10 ; unaffected 0 < 4.10 ; unaffected 5.10.253 ≤ 5.10.* ; unaffected 5.15.203 ≤ 5.15.* ; unaffected 6.1.169 ≤ 6.1.* ; unaffected 6.6.135 ≤ 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