Heimdall Security Logo

CVE-2026-53004

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.1%
Linux•Linux•Versions : <6849b995cda88a677bf08a05765d1db7905974fc, <=6.1.*, <=7.0.*, <=6.12.*, 0, 65b07e5d0d09c77e98050b5f0146ead29e5add32, 6.18.33, 5.15.209, <2b5a2c957c7769d40110f725cf23987fcef50d75, 6.12.91, <=5.10.*, <=6.6.*, <6bcf8fe4ef7967b22b814cbae9a57bbd3c853410, 6.1.175, <0cf004ffb61cd32d140531c3a84afe975f9fc7ea, 2.6.24, 6.6.141, 7.1, <=6.18.*, <a132e199de69e2a45628aa8534df1bf5d44e1b6e, 7.0.10, <70a089cc9590aa347a61e84434116ab74619e3c3, <d45c7e99caf915b0f6c716bd8ffe9d45b9685761, <d67fbc6dea5dbf7f46c618ebf65910a276078e20, 5.10.258, <=*, <=5.15.*, <2.6.24

Description

In the Linux kernel, the following vulnerability has been resolved: sctp: fix OOB write to userspace in sctp_getsockopt_peer_auth_chunks sctp_getsockopt_peer_auth_chunks() checks that the caller's optval buffer is large enough for the peer AUTH chunk list with if (len < num_chunks) return -EINVAL; but then writes num_chunks bytes to p->gauth_chunks, which lives at offset offsetof(struct sctp_authchunks, gauth_chunks) == 8 inside optval. The check is missing the sizeof(struct sctp_authchunks) = 8-byte header. When the caller supplies len == num_chunks (for any num_chunks > 0) the test passes but copy_to_user() writes sizeof(struct sctp_authchunks) = 8 bytes past the declared buffer. The sibling function sctp_getsockopt_local_auth_chunks() at the next line already has the correct check: if (len < sizeof(struct sctp_authchunks) + num_chunks) return -EINVAL; Align the peer variant with its sibling. Reproducer confirms on v7.0-13-generic: an unprivileged userspace caller that opens a loopback SCTP association with AUTH enabled, queries num_chunks with a short optval, then issues the real getsockopt with len == num_chunks and sentinel bytes painted past the buffer observes those sentinel bytes overwritten with the peer's AUTH chunk type. The bytes written are under the peer's control but land in the caller's own userspace; this is not a kernel memory corruption, but it is a kernel-side contract violation that can silently corrupt adjacent userspace data.

Gravité et risque d'exploitation

CVE-2026-53004 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.13 %, ce qui la place devant 2.3 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <6849b995cda88a677bf08a05765d1db7905974fc, <=6.1.*, <=7.0.*, <=6.12.*, 0, 65b07e5d0d09c77e98050b5f0146ead29e5add32, 6.18.33, 5.15.209, <2b5a2c957c7769d40110f725cf23987fcef50d75, 6.12.91, <=5.10.*, <=6.6.*, <6bcf8fe4ef7967b22b814cbae9a57bbd3c853410, 6.1.175, <0cf004ffb61cd32d140531c3a84afe975f9fc7ea, 2.6.24, 6.6.141, 7.1, <=6.18.*, <a132e199de69e2a45628aa8534df1bf5d44e1b6e, 7.0.10, <70a089cc9590aa347a61e84434116ab74619e3c3, <d45c7e99caf915b0f6c716bd8ffe9d45b9685761, <d67fbc6dea5dbf7f46c618ebf65910a276078e20, 5.10.258, <=*, <=5.15.*, <2.6.24) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

Rechercher une autre CVE