CVE-2024-26846
Vulnérabilité moyenne dans Linux (Linux)
Description
In the Linux kernel, the following vulnerability has been resolved: nvme-fc: do not wait in vain when unloading module The module exit path has race between deleting all controllers and freeing 'left over IDs'. To prevent double free a synchronization between nvme_delete_ctrl and ida_destroy has been added by the initial commit. There is some logic around trying to prevent from hanging forever in wait_for_completion, though it does not handling all cases. E.g. blktests is able to reproduce the situation where the module unload hangs forever. If we completely rely on the cleanup code executed from the nvme_delete_ctrl path, all IDs will be freed eventually. This makes calling ida_destroy unnecessary. We only have to ensure that all nvme_delete_ctrl code has been executed before we leave nvme_fc_exit_module. This is done by flushing the nvme_delete_wq workqueue. While at it, remove the unused nvme_fc_wq workqueue too.
Gravité et risque d'exploitation
CVE-2024-26846 obtient un score CVSS de 4.4/10, soit une gravité moyenne. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.22 %, ce qui la place devant 11.5 % des CVE référencées.
Que faire ?
- Vérifiez si Linux (versions <=6.1.*, 4c73cbdff1119d088ed16d63def59ad32b11b18f, 0, 5.10.211, 6.8, <=5.10.*, <4f2c95015ec2a1899161be6c0bdaecedd5a7bfb2, <=6.6.*, <085195aa90a924c79e35569bcdad860d764a8e17, 5.3, <5.3, 6.7.7, <0bf567d6d9ffe09e059bbdfb4d07143cef42c75c, 6.1.80, <=*, <c0882c366418bf9c19e1ba7f270fe377a9bf5d67, 6.6.19, <=5.15.*, <=6.7.*, <baa6b7eb8c66486bd64608adc63fe03b30d3c0b9, <70fbfc47a392b98e5f8dba70c6efc6839205c982, 5.15.150) 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/4f2c95015ec2a1899161be6c0bdaecedd5a7bfb2
- https://git.kernel.org/stable/c/0bf567d6d9ffe09e059bbdfb4d07143cef42c75c
- https://git.kernel.org/stable/c/085195aa90a924c79e35569bcdad860d764a8e17
- https://git.kernel.org/stable/c/baa6b7eb8c66486bd64608adc63fe03b30d3c0b9
- https://git.kernel.org/stable/c/c0882c366418bf9c19e1ba7f270fe377a9bf5d67
- https://git.kernel.org/stable/c/70fbfc47a392b98e5f8dba70c6efc6839205c982