net: dsa: mv88e6xxx: avoid unregistering devlink regions which were never registered (Linux Linux)

CVE-2025-37787
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.19 % · centile 9 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: net: dsa: mv88e6xxx: avoid unregistering devlink regions which were never registered Russell King reports that a system with mv88e6xxx dereferences a NULL pointer when unbinding this driver: https://lore.kernel.org/netdev/Z_lRkMlTJ1KQ0kVX@shell.armlinux.org.uk/ The crash seems to be in devlink_region_destroy(), which is not NULL tolerant but is given a NULL devlink global region pointer. At least on some chips, some devlink regions are conditionally registered since the blamed commit, see mv88e6xxx_setup_devlink_regions_global(): if (cond && !cond(chip)) continue; These are MV88E6XXX_REGION_STU and MV88E6XXX_REGION_PVT. If the chip does not have an STU or PVT, it should crash like this. To fix the issue, avoid unregistering those regions which are NULL, i.e. were skipped at mv88e6xxx_setup_devlink_regions_global() time.

Faiblesses (CWE)

  • CWE-476 — Déréférencement de pointeur nul

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 836021a2d0e0e4c90b895a35bd9c0342071855fb < 8ccdf5e24b276848eefb2755e05ff0f005a0c4a1 ; affected 836021a2d0e0e4c90b895a35bd9c0342071855fb < b3c70dfe51f10df60db2646c08cebd24bcdc5247 ; affected 836021a2d0e0e4c90b895a35bd9c0342071855fb < bbb80f004f7a90c3dcaacc982c59967457254a05 ; affected 836021a2d0e0e4c90b895a35bd9c0342071855fb < 3665695e3572239dc233216f06b41f40cc771889 ; affected 836021a2d0e0e4c90b895a35bd9c0342071855fb < 5f5e95945bb1e08be7655da6acba648274db457d ; affected 836021a2d0e0e4c90b895a35bd9c0342071855fb < c84f6ce918a9e6f4996597cbc62536bbf2247c96
Linux · Linuxaffected 5.13 ; unaffected 0 < 5.13 ; unaffected 5.15.181 ≤ 5.15.* ; unaffected 6.1.135 ≤ 6.1.* ; unaffected 6.6.88 ≤ 6.6.* ; unaffected 6.12.25 ≤ 6.12.*

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