CVE-2026-92508
Vulnérabilité élevée dans Linux (Linux)
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Fix potential use after free in ib_free_cq() When accessing a CQ via the netlink path the only synchronization mechanism for the said CQ is rdma_restrack_get(). Currently, rdma_restrack_del() is invoked at the end of ib_free_cq(), which is too late, since by that point vendor-specific resources associated with the CQ might already be freed. This can leave a short window where the CQ remains accessible through restrack, leading to a potential use-after-free. Fix this by moving the rdma_restrack_del() call to be before the freeing of the vendor-specific resources ensuring that the CQ is removed from restrack before its internal resources are released. This guarantees that no new users hold references to a CQ that is in the process of destruction.
Gravité et risque d'exploitation
CVE-2026-92508 obtient un score CVSS de 7.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.16 %, ce qui la place devant 4.7 % des CVE référencées.
Que faire ?
- Vérifiez si Linux (versions 093f87dda065e0f618dd577985eccbe85efb9b54, <=6.1.*, <=6.12.*, 5.15.221, <b8dcca427096fc9c50f1b376847fea72bc842d31, 0, <29dc2f8e1c97372c2871a70088707933515fbd5b, 6.1.188, 5.9.2, 43d781b9fa562f0c6e50f62c870fbfeb9dc85213, 6.18.52, 7ac277a01f9017fcde4f3f81670c995992945433, <=6.6.*, 6.6.157, <9abea37942534eeb049335476178696b654b000c, 7.2.6, <5.10, <=6.18.*, <a804b162f9bc2b38b2ed1b4752eea9faadb1645b, <5.9, 6.12.110, <=7.2.*, <91f8a17a22ab615a03743120e19935e731f28fb9, <=*, <=5.15.*, 5.8.17, <43403fe45379c64fa6276e5a8ede44493e5d2d3d, 5.10, <76f2cb4f721815c3b6262a6dc2151de88646924c, 7.3) 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/a804b162f9bc2b38b2ed1b4752eea9faadb1645b
- https://git.kernel.org/stable/c/91f8a17a22ab615a03743120e19935e731f28fb9
- https://git.kernel.org/stable/c/76f2cb4f721815c3b6262a6dc2151de88646924c
- https://git.kernel.org/stable/c/b8dcca427096fc9c50f1b376847fea72bc842d31
- https://git.kernel.org/stable/c/9abea37942534eeb049335476178696b654b000c
- https://git.kernel.org/stable/c/43403fe45379c64fa6276e5a8ede44493e5d2d3d
- https://git.kernel.org/stable/c/29dc2f8e1c97372c2871a70088707933515fbd5b