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net: ch9200: fix uninitialised access during mii_nway_restart (Linux Linux)

CVE-2025-38086
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.20 % · centile 10 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

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Description

In the Linux kernel, the following vulnerability has been resolved: net: ch9200: fix uninitialised access during mii_nway_restart In mii_nway_restart() the code attempts to call mii->mdio_read which is ch9200_mdio_read(). ch9200_mdio_read() utilises a local buffer called "buff", which is initialised with control_read(). However "buff" is conditionally initialised inside control_read(): if (err == size) { memcpy(data, buf, size); } If the condition of "err == size" is not met, then "buff" remains uninitialised. Once this happens the uninitialised "buff" is accessed and returned during ch9200_mdio_read(): return (buff[0] | buff[1] << 8); The problem stems from the fact that ch9200_mdio_read() ignores the return value of control_read(), leading to uinit-access of "buff". To fix this we should check the return value of control_read() and return early on error.

Faiblesses (CWE)

  • CWE-908 — Utilisation d'une ressource non initialisée

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 4a476bd6d1d923922ec950ddc4c27b279f6901eb < 119766de4930ff40db9f36b960cb53b0c400e81b ; affected 4a476bd6d1d923922ec950ddc4c27b279f6901eb < 33163c68d2e3061fa3935b5f0a1867958b1cdbd2 ; affected 4a476bd6d1d923922ec950ddc4c27b279f6901eb < 9da3e442714f7f4393ff01c265c4959c03e88c2f ; affected 4a476bd6d1d923922ec950ddc4c27b279f6901eb < 9a350f30d65197354706b7759b5c89d6c267b1a9 ; affected 4a476bd6d1d923922ec950ddc4c27b279f6901eb < 6bd2569d0b2f918e9581f744df0263caf73ee76c ; affected 4a476bd6d1d923922ec950ddc4c27b279f6901eb < 4da7fcc098218ff92b2e83a43f545c02f714cedd
Linux · Linuxaffected 4.3 ; unaffected 0 < 4.3 ; 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