CVE-2026-72005

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: rt2x00: avoid full teardown before work setup in probe rt2x00lib_probe_dev() uses the full rt2x00lib_remove_dev() teardown for all probe failures. However, drv_data allocation and workqueue allocation can fail before intf_work, autowakeup_work and sleep_work have been initialized. Do not enter the full remove path until the probe has reached the point where those work items are set up. Return directly for drv_data allocation failure, and use a small early cleanup path for workqueue allocation failure. This issue was found by our static analysis tool and then confirmed by manual review of rt2x00lib_probe_dev() and rt2x00lib_remove_dev(). The early probe exits should not call a common teardown path that assumes the later work setup has already completed. A QEMU PoC forced alloc_ordered_workqueue() to fail before the work initializers are reached. The resulting fail path entered rt2x00lib_remove_dev(), and DEBUG_OBJECTS reported invalid work drains with rt2x00lib_probe_dev() and rt2x00lib_remove_dev() in the stack.

Gravité et risque d'exploitation

CVE-2026-72005 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 5.3 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions <=6.1.*, 7.1.5, 6.18.40, <59afe6148927395cf86f9429900e029a48b1d42b, <=6.12.*, 0439f5367c8d8bb2ebaca8d7329f51f3148b2fb2, 2.6.39, 0, <56994852d704535ea354a4627ca667b1b4fa0deb, <=7.1.*, <536fb3d739d75a03cb318c0c6fe799425cfea501, 6.1.178, <eb7474d0253bb2de4793e1d3ce833e8564bbe732, <=5.10.*, <=6.6.*, 6.12.97, <816559409e340acaa5c9d868291dab30d8c80263, <8b58d1f1356df6a7d2de3f55bb665b18b04ffda0, <3c0427d719bddb33caf18ff4ffb77cb47de7eb00, <=6.18.*, 5.15.212, 6.6.145, 5.10.261, <66bd9b1a72de7c2f5141b02d796048aafaed8a49, <=*, <=5.15.*, 7.2, <2.6.39) 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/8b58d1f1356df6a7d2de3f55bb665b18b04ffda0
• https://git.kernel.org/stable/c/59afe6148927395cf86f9429900e029a48b1d42b
• https://git.kernel.org/stable/c/3c0427d719bddb33caf18ff4ffb77cb47de7eb00
• https://git.kernel.org/stable/c/eb7474d0253bb2de4793e1d3ce833e8564bbe732
• https://git.kernel.org/stable/c/66bd9b1a72de7c2f5141b02d796048aafaed8a49
• https://git.kernel.org/stable/c/816559409e340acaa5c9d868291dab30d8c80263
• https://git.kernel.org/stable/c/56994852d704535ea354a4627ca667b1b4fa0deb
• https://git.kernel.org/stable/c/536fb3d739d75a03cb318c0c6fe799425cfea501