fbcon: Make sure modelist not set on unregistered console (Linux Linux)

CVE-2025-38198
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.19 % · 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: fbcon: Make sure modelist not set on unregistered console It looks like attempting to write to the "store_modes" sysfs node will run afoul of unregistered consoles: UBSAN: array-index-out-of-bounds in drivers/video/fbdev/core/fbcon.c:122:28 index -1 is out of range for type 'fb_info *[32]' ... fbcon_info_from_console+0x192/0x1a0 drivers/video/fbdev/core/fbcon.c:122 fbcon_new_modelist+0xbf/0x2d0 drivers/video/fbdev/core/fbcon.c:3048 fb_new_modelist+0x328/0x440 drivers/video/fbdev/core/fbmem.c:673 store_modes+0x1c9/0x3e0 drivers/video/fbdev/core/fbsysfs.c:113 dev_attr_store+0x55/0x80 drivers/base/core.c:2439 static struct fb_info *fbcon_registered_fb[FB_MAX]; ... static signed char con2fb_map[MAX_NR_CONSOLES]; ... static struct fb_info *fbcon_info_from_console(int console) ... return fbcon_registered_fb[con2fb_map[console]]; If con2fb_map contains a -1 things go wrong here. Instead, return NULL, as callers of fbcon_info_from_console() are trying to compare against existing "info" pointers, so error handling should kick in correctly.

Faiblesses (CWE)

  • CWE-129 — Validation incorrecte d'un indice de tableau

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 409d6c95f9c68bb7046410a3502e26e454a1e636 < b3237d451bf3a4490cb1a76f3b7c91d9888f1c4b ; affected 409d6c95f9c68bb7046410a3502e26e454a1e636 < 519ba75728ee8cd561dce25fc52a2ec5c47171dc ; affected 409d6c95f9c68bb7046410a3502e26e454a1e636 < f28f1f578cd810779d01999c60618cda14c281dd ; affected 409d6c95f9c68bb7046410a3502e26e454a1e636 < 54b28f7c567dd659e5f9562f518e4d7f3f6a367b ; affected 409d6c95f9c68bb7046410a3502e26e454a1e636 < cedc1b63394a866bf8663a3e40f4546f1d28c8d8
Linux · Linuxaffected 5.19 ; unaffected 0 < 5.19 ; unaffected 6.1.142 ≤ 6.1.* ; unaffected 6.6.95 ≤ 6.6.* ; unaffected 6.12.35 ≤ 6.12.* ; unaffected 6.15.4 ≤ 6.15.*

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