CVE-2026-68300

sctp: auth: verify auth requirement when auth_chunk is NULL

CRITICAL 9.8

En bref

Source
NVD
EPSS
EPSS 0.58 % · centile 48 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Received

Description

In the Linux kernel, the following vulnerability has been resolved: sctp: auth: verify auth requirement when auth_chunk is NULL sctp_auth_chunk_verify() returns true unconditionally when chunk->auth_chunk is NULL, silently skipping authentication. This is incorrect when: 1. skb_clone() failed in the BH receive path, leaving auth_chunk NULL. In sctp_endpoint_bh_rcv() asoc is NULL for new connections, so the early sctp_auth_recv_cid() check cannot catch this. 2. No AUTH chunk precedes COOKIE-ECHO, so skb_clone() is never called and auth_chunk remains NULL. Fix by checking sctp_auth_recv_cid() when auth_chunk is NULL: if authentication is required, return false to drop the chunk; otherwise continue normally.

Faiblesses (CWE)

  • CWE-287 — Authentification 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

Produits affectés

ProduitVersions
Linux · Linuxaffected bbd0d59809f923ea2b540cbd781b32110e249f6e < a129792b3aef15002746c13522781d92ed3522c3 ; affected bbd0d59809f923ea2b540cbd781b32110e249f6e < 5a022ac51ad83b4ce6c898f4b9eefc65bd26b247 ; affected bbd0d59809f923ea2b540cbd781b32110e249f6e < 6caf0e8590c0bf05a76b0d387726adf3a6f3725c ; affected bbd0d59809f923ea2b540cbd781b32110e249f6e < ec2e157fc9678a9bc411305a25aec3fd337d7efb ; affected bbd0d59809f923ea2b540cbd781b32110e249f6e < 28c5fdce9dd955d2baf5e28987819b6d7cfaf646 ; affected bbd0d59809f923ea2b540cbd781b32110e249f6e < 18957373920caf5cdaf5cf32e5d1d7a99ca7700a
Linux · Linuxaffected 2.6.24 ; unaffected 0 < 2.6.24 ; unaffected 5.10.265 ≤ 5.10.* ; unaffected 5.15.216 ≤ 5.15.* ; unaffected 6.1.183 ≤ 6.1.* ; unaffected 6.6.148 ≤ 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