CVE-2026-74379

Description

In the Linux kernel, the following vulnerability has been resolved: dax/kmem: account for partial discontiguous resource upon removal When dev_dax_kmem_probe() partially succeeds (at least one range is mapped) but a subsequent range fails request_mem_region() or add_memory_driver_managed(), the probe silently continues, ultimately returning success, but with the corresponding range resource NULL'ed out. dev_dax_kmem_remove() iterates over all dax_device ranges regardless of if the underlying resource exists. When remove_memory() is called later, it returns 0 because the memory was never added which causes dev_dax_kmem_remove() to incorrectly assume the (nonexistent) resource can be removed and attempts cleanup on a NULL pointer. Fix this by skipping these ranges altogether, noting that these cases are considered success, such that the cleanup is still reached when all actually-added ranges are successfully removed.

Gravité et risque d'exploitation

CVE-2026-74379 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 11.1 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions <=6.1.*, 7.1.5, 6.18.40, <=6.12.*, <598ed7393a639c7547b28ff3e14db9f1ac37c132, 0, <5d3139abb9d1671fa5e42c3d6d8cb3b05479c5bb, <=7.1.*, <8aa442cfce79e2d69e72fc8e0c0864ac2971149d, 6.1.178, <d47b0b8a69a13e06afafa54723f3e8c99b0c788f, <=6.6.*, <30ea97affbcce236c57287c82dc6ef7a29c63b76, 6.12.97, <5.10, <=6.18.*, <799e54c510a03a65a57627018a817838d72f35bd, 5.15.212, 6.6.145, <ef4fc53898bd6c4d0119cc6d419ebef7f2560f31, <=*, 60e93dc097f7f13a16a7e4b75b8803eb2adbb721, <=5.15.*, 7.2, 5.10) 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/ef4fc53898bd6c4d0119cc6d419ebef7f2560f31
• https://git.kernel.org/stable/c/5d3139abb9d1671fa5e42c3d6d8cb3b05479c5bb
• https://git.kernel.org/stable/c/d47b0b8a69a13e06afafa54723f3e8c99b0c788f
• https://git.kernel.org/stable/c/799e54c510a03a65a57627018a817838d72f35bd
• https://git.kernel.org/stable/c/598ed7393a639c7547b28ff3e14db9f1ac37c132
• https://git.kernel.org/stable/c/30ea97affbcce236c57287c82dc6ef7a29c63b76
• https://git.kernel.org/stable/c/8aa442cfce79e2d69e72fc8e0c0864ac2971149d