hwmon: (w83791d) Convert macros to functions to avoid TOCTOU (Linux Linux)

CVE-2025-71111
MEDIUM 4.7

En bref

Source
NVD
EPSS
EPSS 0.10 % · centile 1 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (w83791d) Convert macros to functions to avoid TOCTOU The macro FAN_FROM_REG evaluates its arguments multiple times. When used in lockless contexts involving shared driver data, this leads to Time-of-Check to Time-of-Use (TOCTOU) race conditions, potentially causing divide-by-zero errors. Convert the macro to a static function. This guarantees that arguments are evaluated only once (pass-by-value), preventing the race conditions. Additionally, in store_fan_div, move the calculation of the minimum limit inside the update lock. This ensures that the read-modify-write sequence operates on consistent data. Adhere to the principle of minimal changes by only converting macros that evaluate arguments multiple times and are used in lockless contexts.

Faiblesses (CWE)

  • CWE-362 — Situation de compétition
  • CWE-367 — Situation de compétition TOCTOU

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 4.7CVSS:3.1/AV:L/AC:H/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 9873964d6eb24bd0205394f9b791de9eddbcb855 < 3dceb68f6ad33156032ef4da21a93d84059cca6d ; affected 9873964d6eb24bd0205394f9b791de9eddbcb855 < bf5b03227f2e6d4360004886d268f9df8993ef8f ; affected 9873964d6eb24bd0205394f9b791de9eddbcb855 < f2b579a0c37c0df19603d719894a942a295f634a ; affected 9873964d6eb24bd0205394f9b791de9eddbcb855 < f94800fbc26ccf7c81eb791707b038a57aa39a18 ; affected 9873964d6eb24bd0205394f9b791de9eddbcb855 < a9fb6e8835a22f5796c1182ed612daed3fd273af ; affected 9873964d6eb24bd0205394f9b791de9eddbcb855 < c8cf0c2bdcccc6634b6915ff793b844e12436680
Linux · Linuxaffected 2.6.18 ; unaffected 0 < 2.6.18 ; unaffected 5.10.248 ≤ 5.10.* ; unaffected 5.15.198 ≤ 5.15.* ; unaffected 6.1.160 ≤ 6.1.* ; unaffected 6.6.120 ≤ 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