CVE-2026-74381

Description

In the Linux kernel, the following vulnerability has been resolved: gpu: host1x: Allow entries in BO caches to be freed When a buffer object is pinned via host1x_bo_pin() with a cache, the resulting mapping is kept in the cache so it can be reused on subsequent pins. Each mapping held a reference to the underlying host1x_bo (taken in tegra_bo_pin / gather_bo_pin), so as long as a mapping was cached, the bo itself could not be freed. However, the only way to remove the cached mapping was through the free path of the buffer object. This meant that if a bo got cached, it could never get freed again. Resolve the circularity by holding a weak reference to the bo from the cache side. This is done by having the .pin callbacks not bump the bo's refcount -- instead the common Host1x bo code does so, except for the cache reference. Also move the remove-cache-mapping-on-free code into a common function inside Host1x code. This is only called from the TegraDRM GEM buffers since those are the only ones that can be cached at the moment.

Gravité et risque d'exploitation

CVE-2026-74381 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 0.21 %, ce qui la place devant 11.0 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions <=6.1.*, 7.1.5, 6.18.40, <=6.12.*, 7.2, <8c0d3cf0d5108c96317e0eca92b60dd368867cef, 0, <df63c76f9c8d881ca7bce1aecfba512328d0527d, <=7.1.*, <5.17, 6.1.178, <0e9dd7cfb9986b78cc81eca126ccfbf57f4c0602, 6.12.97, <=6.6.*, <=6.18.*, 6.6.145, <af755456299d44e4ed6af3b7c70a7f03ea37fdf1, <=*, <3cbf5e3c46e66d9b3b6b91099bb720c6cb1be3bc, <71c017b3f83ff72638f2a1b1d6d4e7bc61d30231, 1f39b1dfa53c84b56d7ad37fed44afda7004959d, 5.17) 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

• https://git.kernel.org/stable/c/af755456299d44e4ed6af3b7c70a7f03ea37fdf1
• https://git.kernel.org/stable/c/71c017b3f83ff72638f2a1b1d6d4e7bc61d30231
• https://git.kernel.org/stable/c/0e9dd7cfb9986b78cc81eca126ccfbf57f4c0602
• https://git.kernel.org/stable/c/8c0d3cf0d5108c96317e0eca92b60dd368867cef
• https://git.kernel.org/stable/c/df63c76f9c8d881ca7bce1aecfba512328d0527d
• https://git.kernel.org/stable/c/3cbf5e3c46e66d9b3b6b91099bb720c6cb1be3bc