fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod() (Linux Linux)

CVE-2025-38312
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.18 % · centile 8 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod() In fb_find_mode_cvt(), iff mode->refresh somehow happens to be 0x80000000, cvt.f_refresh will become 0 when multiplying it by 2 due to overflow. It's then passed to fb_cvt_hperiod(), where it's used as a divider -- division by 0 will result in kernel oops. Add a sanity check for cvt.f_refresh to avoid such overflow... Found by Linux Verification Center (linuxtesting.org) with the Svace static analysis tool.

Faiblesses (CWE)

  • CWE-369 — Division par zéro

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 96fe6a2109db29cd15b90a093c16e6cb4b19371a < 9027ce4c037b566b658b8939a76326b7125e3627 ; affected 96fe6a2109db29cd15b90a093c16e6cb4b19371a < 610f247f2772e4f92b63442125a1b7ade79898d8 ; affected 96fe6a2109db29cd15b90a093c16e6cb4b19371a < 2d63433e8eaa3c91b2948190e395bc67009db0d9 ; affected 96fe6a2109db29cd15b90a093c16e6cb4b19371a < 54947530663edcbaaee1314c01fdd8c72861b124 ; affected 96fe6a2109db29cd15b90a093c16e6cb4b19371a < ab91647acdf43b984824776559a452212eaeb21a ; affected 96fe6a2109db29cd15b90a093c16e6cb4b19371a < b235393b9f43ff86a38ca2bde6372312ea215dc5
Linux · Linuxaffected 2.6.14 ; unaffected 0 < 2.6.14 ; unaffected 5.4.295 ≤ 5.4.* ; unaffected 5.10.239 ≤ 5.10.* ; unaffected 5.15.186 ≤ 5.15.* ; unaffected 6.1.142 ≤ 6.1.*

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