net: tls: fix off-by-one in sg_chain entry count for wrapped sk_msg ring (Linux Linux)

CVE-2026-64047
CRITICAL 9.8

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: net: tls: fix off-by-one in sg_chain entry count for wrapped sk_msg ring When an sk_msg scatterlist ring wraps (sg.end < sg.start), tls_push_record() chains the tail portion of the ring to the head using sg_chain(). An extra entry in the sg array is reserved for this: struct sk_msg_sg { [...] /* The extra two elements: * 1) used for chaining the front and sections when the list becomes * partitioned (e.g. end < start). The crypto APIs require the * chaining; * 2) to chain tailer SG entries after the message. */ struct scatterlist data[MAX_MSG_FRAGS + 2]; The current code uses MAX_SKB_FRAGS + 1 as the ring size: sg_chain(&msg_pl->sg.data[msg_pl->sg.start], MAX_SKB_FRAGS - msg_pl->sg.start + 1, msg_pl->sg.data); This places the chain pointer at sg_chain(data[start], (MAX_SKB_FRAGS - msg_start + 1) .. = &data[start] + (MAX_SKB_FRAGS - msg_start + 1) - 1 = data[start + (MAX_SKB_FRAGS - start + 1) - 1] = data[MAX_SKB_FRAGS] instead of the true last entry. This is likely due to a "race" of the commit under Fixes landing close to commit 031097d9e079 ("bpf: sk_msg, zap ingress queue on psock down") Convert to ARRAY_SIZE and drop the data[start] / - start (as suggested by Sabrina).

Faiblesses (CWE)

  • CWE-191 — Soupassement d'entier
  • CWE-193 — Erreur de décalage d'une unité

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 9aaaa56845a06aeabdd597cbe19492dc01f281ec < 73963a375885d5ccb7def39fd0b4f542e0f343dd ; affected 9aaaa56845a06aeabdd597cbe19492dc01f281ec < 47110c3a9ac247b688657337f5981efcfcb240dc ; affected 9aaaa56845a06aeabdd597cbe19492dc01f281ec < 84158c2997159df4a0d70cd9c46774512d32a522 ; affected 9aaaa56845a06aeabdd597cbe19492dc01f281ec < 131ef12057d92b77b636321b7849c69222405a97 ; affected 9aaaa56845a06aeabdd597cbe19492dc01f281ec < 66339b71f105e6f83e0da3b9583d95077534fe1d ; affected 9aaaa56845a06aeabdd597cbe19492dc01f281ec < eca989eab4b2599dcb02f72140a7c08f08838520
Linux · Linuxaffected 5.5 ; unaffected 0 < 5.5 ; unaffected 5.10.258 ≤ 5.10.* ; unaffected 5.15.209 ≤ 5.15.* ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.142 ≤ 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