net: mdio: unexport __init-annotated mdio_bus_init() (Linux Linux)

CVE-2022-49350
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.28 % · centile 21 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: net: mdio: unexport __init-annotated mdio_bus_init() EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic. modpost used to detect it, but it has been broken for a decade. Recently, I fixed modpost so it started to warn it again, then this showed up in linux-next builds. There are two ways to fix it: - Remove __init - Remove EXPORT_SYMBOL I chose the latter for this case because the only in-tree call-site, drivers/net/phy/phy_device.c is never compiled as modular. (CONFIG_PHYLIB is boolean)

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 90eff9096c01ba90cdae504a6b95ee87fe2556a3 < ab64ec2c75683f30ccde9eaaf0761002f901aa12 ; affected 90eff9096c01ba90cdae504a6b95ee87fe2556a3 < 5534bcd7c40299862237c4a8fd9c5031b3db1538 ; affected 90eff9096c01ba90cdae504a6b95ee87fe2556a3 < 6a90a44d53428a3bf01bd80df9ba78b19959270c ; affected 90eff9096c01ba90cdae504a6b95ee87fe2556a3 < 7759c3222815b945a94b212bc0c6cdec475cfec2 ; affected 90eff9096c01ba90cdae504a6b95ee87fe2556a3 < 59fa94cddf9eef8d8dae587373eed8b8f4eb11d7 ; affected 90eff9096c01ba90cdae504a6b95ee87fe2556a3 < f5c68137f1191ba3fcf6260ec71b30be2e2bf4c3
Linux · Linuxaffected 4.12 ; unaffected 0 < 4.12 ; unaffected 4.14.283 ≤ 4.14.* ; unaffected 4.19.247 ≤ 4.19.* ; unaffected 5.4.198 ≤ 5.4.* ; unaffected 5.10.122 ≤ 5.10.*

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