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CVE-2026-53325

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.1%
Linux•Linux•Versions : <0aa9b27c454c53074cde592eaceb442d30341585, <=6.1.*, <eb045714bc6a2bbb0befb7a31b996a196e188869, <=7.0.*, <=6.12.*, 6.6.144, 5.15.211, <1d7d45050e14083c1de1460c93f4063c1f0bca7b, 7.0.14, 2.6.18, 0, <=7.1.*, 5.10.260, <2.6.18, <=5.10.*, <=6.6.*, 6.12.95, a32073bffc656ca4bde6002b6cf7c1a8e0e22712, <564b3b3f6565313eb6fa5355ffd037d6fb27897f, <cefe535a60a2e00e09f4b2689b0c8ffc6912459a, <ce800993af477fc24187349c6a20d3073140b759, <3e844a63668d1c3d10a9d347d7ebf161b2f91c84, 7.1.2, 6.18.37, <b08472db93b1ccff84a7adec5779d47f0e9d3a30, <=6.18.*, 6.1.177, <=*, <=5.15.*, <53483a9f4ee9eeb18aa866ec16cce79e136987e1, 7.2

Description

In the Linux kernel, the following vulnerability has been resolved: agp/amd64: Fix broken error propagation in agp_amd64_probe() A NULL pointer dereference was observed in the AMD64 AGP driver when running in a virtualized environment (e.g. qemu/kvm) without a physical AMD northbridge. The crash occurs in amd64_fetch_size() when attempting to dereference the pointer returned by node_to_amd_nb(0). The root cause of this crash is broken error propagation in agp_amd64_probe(): When no AMD northbridges are found, cache_nbs() correctly returns -ENODEV. However, the probe function erroneously checks the return value against exactly -1, rather than < 0. As a result, the hardware absence error is masked, allowing the driver to improperly proceed with initialization. It eventually calls agp_add_bridge(), which invokes amd64_fetch_size(). Since the hardware does not exist, node_to_amd_nb(0) returns NULL, leading to a General Protection Fault (GPF) when accessing its ->misc member. Fix the issue by correcting the error check in agp_amd64_probe() to abort properly when cache_nbs() returns any negative error code. This prevents the driver from erroneously proceeding without hardware, thereby avoiding the subsequent NULL pointer dereference at its source.

Gravité et risque d'exploitation

CVE-2026-53325 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.13 %, ce qui la place devant 2.3 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <0aa9b27c454c53074cde592eaceb442d30341585, <=6.1.*, <eb045714bc6a2bbb0befb7a31b996a196e188869, <=7.0.*, <=6.12.*, 6.6.144, 5.15.211, <1d7d45050e14083c1de1460c93f4063c1f0bca7b, 7.0.14, 2.6.18, 0, <=7.1.*, 5.10.260, <2.6.18, <=5.10.*, <=6.6.*, 6.12.95, a32073bffc656ca4bde6002b6cf7c1a8e0e22712, <564b3b3f6565313eb6fa5355ffd037d6fb27897f, <cefe535a60a2e00e09f4b2689b0c8ffc6912459a, <ce800993af477fc24187349c6a20d3073140b759, <3e844a63668d1c3d10a9d347d7ebf161b2f91c84, 7.1.2, 6.18.37, <b08472db93b1ccff84a7adec5779d47f0e9d3a30, <=6.18.*, 6.1.177, <=*, <=5.15.*, <53483a9f4ee9eeb18aa866ec16cce79e136987e1, 7.2) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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