CVE-2026-72406
Vulnérabilité élevée dans Linux (Linux)
Description
In the Linux kernel, the following vulnerability has been resolved: net: sungem: fix probe error cleanup gem_init_one() calls gem_remove_one() when register_netdev() fails. gem_remove_one() unregisters and frees resources owned by the net_device, including the DMA block, MMIO mapping, PCI regions, and the net_device itself. gem_init_one() then falls through to its own cleanup labels and frees the same resources again. Keep the register_netdev() error path in gem_init_one(): clear drvdata so PM/remove paths do not see a half-registered device, remove the NAPI instance added during probe, and let the existing cleanup labels release the resources once. The issue was found by a local static-analysis checker for probe error paths. The reported path was manually inspected before sending this fix. Compile-tested with CONFIG_SUNGEM=y. Runtime testing was not performed because no sungem hardware is available.
Gravité et risque d'exploitation
CVE-2026-72406 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 0.17 %, ce qui la place devant 5.8 % des CVE référencées.
Que faire ?
- Vérifiez si Linux (versions <=6.1.*, 7.1.5, <f3bd60b26814b7c3c57c629abb0857dfc76d214a, <=6.12.*, 6.18.40, 2.6.12, 0, <a63eaf7605d1579cf3f551792e478cfaf5ac37d1, <=7.1.*, <2.6.12, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 6.1.178, <=5.10.*, <=6.6.*, 6.12.97, <bc49e8746584564dba47d963d1916cc876fc6f6b, <=6.18.*, 5.15.212, 6.6.145, 5.10.261, <b15a3cc68e2450aa0edd94a74a7bdd45fcc17dd9, <=*, <=5.15.*, <fb73cdc50b6755e5c3a80a195b2708a39ada0230, <36dea2f639249460d13f6ca66b2a9064187cd34d, <331c99029a1cee1111f82f63d15b3cdebefbd341, 7.2, <f1d04fefb0c2a2de32d9cee22cdc2088be3758d1) 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/f3bd60b26814b7c3c57c629abb0857dfc76d214a
- https://git.kernel.org/stable/c/f1d04fefb0c2a2de32d9cee22cdc2088be3758d1
- https://git.kernel.org/stable/c/331c99029a1cee1111f82f63d15b3cdebefbd341
- https://git.kernel.org/stable/c/a63eaf7605d1579cf3f551792e478cfaf5ac37d1
- https://git.kernel.org/stable/c/fb73cdc50b6755e5c3a80a195b2708a39ada0230
- https://git.kernel.org/stable/c/b15a3cc68e2450aa0edd94a74a7bdd45fcc17dd9
- https://git.kernel.org/stable/c/bc49e8746584564dba47d963d1916cc876fc6f6b
- https://git.kernel.org/stable/c/36dea2f639249460d13f6ca66b2a9064187cd34d