rxrpc: reject undecryptable rxkad response tickets (Linux Linux)

CVE-2026-31637
CRITICAL 9.8

En bref

Source
NVD
EPSS
EPSS 0.59 % · centile 48 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: reject undecryptable rxkad response tickets rxkad_decrypt_ticket() decrypts the RXKAD response ticket and then parses the buffer as plaintext without checking whether crypto_skcipher_decrypt() succeeded. A malformed RESPONSE can therefore use a non-block-aligned ticket length, make the decrypt operation fail, and still drive the ticket parser with attacker-controlled bytes. Check the decrypt result and abort the connection with RXKADBADTICKET when ticket decryption fails.

Faiblesses (CWE)

  • CWE-754 — Vérification incorrecte de conditions inhabituelles ou exceptionnelles

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 17926a79320afa9b95df6b977b40cca6d8713cea < 252157d939d179b5d767cb860ff8fa7f8723b67a ; affected 17926a79320afa9b95df6b977b40cca6d8713cea < a75b3b361dd481d942c5f259a82d59718a41092c ; affected 17926a79320afa9b95df6b977b40cca6d8713cea < b3a808cd0790b5075aaa2bc3588edf02cd71d352 ; affected 17926a79320afa9b95df6b977b40cca6d8713cea < 47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a ; affected 17926a79320afa9b95df6b977b40cca6d8713cea < a149dcae23309df9de1c3b6b5d468610ef5ab7de ; affected 17926a79320afa9b95df6b977b40cca6d8713cea < 22f6258e7b31dba9bf88dce4e3ee7f0f20072e60
Linux · Linuxaffected 2.6.22 ; unaffected 0 < 2.6.22 ; unaffected 5.10.258 ≤ 5.10.* ; unaffected 5.15.209 ≤ 5.15.* ; unaffected 6.1.175 ≤ 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