CVE-2025-40322

fbdev: bitblit: bound-check glyph index in bit_putcs*

En bref

Sévérité
HIGH 7.1
EPSS
EPSS 0.14 % · centile 4 (2026-10-27)
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Deferred

Description

In the Linux kernel, the following vulnerability has been resolved: fbdev: bitblit: bound-check glyph index in bit_putcs* bit_putcs_aligned()/unaligned() derived the glyph pointer from the character value masked by 0xff/0x1ff, which may exceed the actual font's glyph count and read past the end of the built-in font array. Clamp the index to the actual glyph count before computing the address. This fixes a global out-of-bounds read reported by syzbot.

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HLinux
CVSS 3.1HIGH 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Produits affectés

ProduitVersions
Linux · Linuxaffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a10cede006f9614b465cf25609a8753efbfd45cc ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0998a6cb232674408a03e8561dc15aa266b2f53b ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < db5c9a162d2f42bcc842b76b3d935dcc050a0eec ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c12003bf91fdff381c55ef54fef3e961a5af2545 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9ba1a7802ca9a2590cef95b253e6526f4364477f ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 901f44227072be60812fe8083e83e1533c04eed1
Linux · Linuxaffected 2.6.12 ; unaffected 0 < 2.6.12 ; unaffected 5.4.302 ≤ 5.4.* ; unaffected 5.10.247 ≤ 5.10.* ; unaffected 5.15.197 ≤ 5.15.* ; unaffected 6.1.159 ≤ 6.1.*

Références

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