tunnels: do not assume transport header in iptunnel_pmtud_check_icmp() (Linux Linux)

CVE-2026-63992
CRITICAL 9.1

En bref

Source
NVD
EPSS
EPSS 0.51 % · centile 44 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: tunnels: do not assume transport header in iptunnel_pmtud_check_icmp() In some cases, iptunnel_pmtud_check_icmp() can be called while skb transport header is not set. This triggers an out-of-bound access, because (typeof(skb->transport_header))~0U is 65535. Access the icmp header based on IPv4 network header, after making sure icmp->type is present in skb linear part. Note that iptunnel_pmtud_check_icmpv6()) is fine.

Faiblesses (CWE)

  • CWE-125 — Lecture hors limites

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1CRITICAL 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HLinux
CVSS 3.1CRITICAL 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 4cb47a8644cc9eb8ec81190a50e79e6530d0297f < 5a92cb45e34749865d03daf8d3500f77b5f6644c ; affected 4cb47a8644cc9eb8ec81190a50e79e6530d0297f < c7b7ec3e69e673c0d6b57f74d21da50c485c598e ; affected 4cb47a8644cc9eb8ec81190a50e79e6530d0297f < 7f4f7efe7f30edd29c4988de01728bf2398217e4 ; affected 4cb47a8644cc9eb8ec81190a50e79e6530d0297f < e917d0c69f01af2bb4fbea2b66d560a53b3ac7ec ; affected 4cb47a8644cc9eb8ec81190a50e79e6530d0297f < a096b6e34f602950af9a2b0856cd93a5f4c276d7 ; affected 4cb47a8644cc9eb8ec81190a50e79e6530d0297f < 43368636c663cff6e59dde93cf4b8e43ac28eb93
Linux · Linuxaffected 5.9 ; unaffected 0 < 5.9 ; 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