CVE-2026-68255
drm/virtio: bound EDID block reads to the response buffer
En bref
- Source
- NVD
- EPSS
- EPSS 0.19 % · centile 8 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- Linux
- Statut NVD
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: drm/virtio: bound EDID block reads to the response buffer virtio_get_edid_block() validates the read offset only against the device-supplied resp->size field, never against the fixed-size resp->edid array. The EDID block index is driven by the device-supplied extension count, so a malicious virtio-gpu backend can advertise a large size together with a high block count and read far past the array into adjacent kernel memory, which is then surfaced in the parsed EDID (an out-of-bounds read / info leak). Also reject any read whose end exceeds the size of the edid array. Conforming EDID responses stay within the array and are unaffected.
Faiblesses (CWE)
- CWE-125 — Lecture hors limites
Références
- https://git.kernel.org/stable/c/65ce911f341ad8ff0c08922eff5bb6db75666eb0
- https://git.kernel.org/stable/c/64bedd2758eccbc74d39f7006a7ec16fa39dc901
- https://git.kernel.org/stable/c/3f506a85a905b080cadc029a1651a310479090a6
- https://git.kernel.org/stable/c/9fc2a017c5d597937e0c28b9a9669844aa796c42
- https://git.kernel.org/stable/c/2757e6e803092cf0aeaf4b735e16b5d3bdc705c5
- https://git.kernel.org/stable/c/35be0e2c6862abcd5e5f5445261f1fd910d4a9b4
- https://git.kernel.org/stable/c/375c1934ef0196d3b6d3a1eae3232bef8dae7bf7
- https://git.kernel.org/stable/c/4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccd
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.7 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H | Linux |
| CVSS 3.1 | HIGH 7.7 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
Références européennes
- ENISA EUVD · EUVD-2026-55356
- GCVE · GCVE-0-2026-68255
Avis du CERT-FR
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1333 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1286 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1255 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1202 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1164 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1163 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1069 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Produits affectés
| Produit | Versions |
|---|---|
| Linux · Linux | affected b4b01b4995fb15b55a2d067eb405917f5ab32709 < 65ce911f341ad8ff0c08922eff5bb6db75666eb0 ; affected b4b01b4995fb15b55a2d067eb405917f5ab32709 < 64bedd2758eccbc74d39f7006a7ec16fa39dc901 ; affected b4b01b4995fb15b55a2d067eb405917f5ab32709 < 3f506a85a905b080cadc029a1651a310479090a6 ; affected b4b01b4995fb15b55a2d067eb405917f5ab32709 < 9fc2a017c5d597937e0c28b9a9669844aa796c42 ; affected b4b01b4995fb15b55a2d067eb405917f5ab32709 < 2757e6e803092cf0aeaf4b735e16b5d3bdc705c5 ; affected b4b01b4995fb15b55a2d067eb405917f5ab32709 < 35be0e2c6862abcd5e5f5445261f1fd910d4a9b4 |
| Linux · Linux | affected 5.0 ; unaffected 0 < 5.0 ; unaffected 5.10.266 ≤ 5.10.* ; unaffected 5.15.217 ≤ 5.15.* ; unaffected 6.1.183 ≤ 6.1.* ; unaffected 6.6.148 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |