bpf: sockmap: fix tail fragment offset in bpf_msg_push_data (Linux Linux)

CVE-2026-63926
HIGH 8.4

En bref

Source
NVD
EPSS
EPSS 0.19 % · centile 8 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: sockmap: fix tail fragment offset in bpf_msg_push_data When bpf_msg_push_data() inserts data in the middle of a scatterlist entry, it splits the original entry into a left fragment and a right fragment. The right fragment offset is page-local, but the code advances it with `start`, which is the message-global insertion point. For inserts into a non-first SG entry, this over-advances the offset and leaves the split layout inconsistent. Advance the right fragment offset by the fragment-local delta, `start - offset`, which matches the length removed from the front of the original entry.

Faiblesses (CWE)

  • CWE-190 — Débordement d'entier
  • CWE-681 — Incorrect Conversion between Numeric Types

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 8.4CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 8.4CVSS:3.1/AV:L/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 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 < f14609d8146707452e0822f3c8154674ce677251 ; affected 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 < d81b323af2dcee47573907ccb89c0df9b45cb2e2 ; affected 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 < aeb95146848d12206e1b2cfacd4f40e21ce81d94 ; affected 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 < 96b72672ce849a1402730238e64d9b20bf06a96d ; affected 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 < 3075c21d2d76c0067f4a382765b43d6cc10470f1 ; affected 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 < 5e19028667963fb371ebb00cecc2a473ef92056b
Linux · Linuxaffected 4.20 ; unaffected 0 < 4.20 ; 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