ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup() (Linux Linux)

CVE-2026-53221
CRITICAL 9.8

En bref

Source
NVD
EPSS
EPSS 0.58 % · centile 47 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup() In vti6_tnl_lookup(), when an exact match for a tunnel fails, the code falls back to searching for wildcard tunnels: - Tunnels matching the packet's local address, with any remote address wildcard remote). - Tunnels matching the packet's remote address, with any local address (wildcard local). However, vti6 stores all these different types of tunnels in the same hash table (ip6n->tnls_r_l) prone to hash collisions. The bug is that the fallback search loops in vti6_tnl_lookup() were missing checks to ensure that the candidate tunnel actually has a wildcard address.

Faiblesses (CWE)

  • CWE-20 — Validation d'entrée incorrecte

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 fbe68ee87522f6eaa10f9076c0a7117e1613f2f7 < c327fa4fca31415431202e063767a7ae342e19c6 ; affected fbe68ee87522f6eaa10f9076c0a7117e1613f2f7 < fc657ac0767c49839b3ef0b08dc0953ca30883f8 ; affected fbe68ee87522f6eaa10f9076c0a7117e1613f2f7 < 47fb3c2b4203556308e64354b3e78f2ce221d646 ; affected fbe68ee87522f6eaa10f9076c0a7117e1613f2f7 < f513f308cc4bdb4530d033431592ffbc29b7fca1 ; affected fbe68ee87522f6eaa10f9076c0a7117e1613f2f7 < 90fd4513315ca07da99cfd8549d3e553a7160f0d ; affected fbe68ee87522f6eaa10f9076c0a7117e1613f2f7 < 2abfb19bbb81958714ad1d43ebeb65b30394184b
Linux · Linuxaffected 3.19 ; unaffected 0 < 3.19 ; unaffected 5.10.259 ≤ 5.10.* ; unaffected 5.15.210 ≤ 5.15.* ; unaffected 6.1.176 ≤ 6.1.* ; unaffected 6.6.143 ≤ 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