CVE-2026-68214

Description

In the Linux kernel, the following vulnerability has been resolved: media: rtl2832: fix use-after-free in rtl2832_remove() cancel_delayed_work_sync() is called before i2c_mux_del_adapters() in rtl2832_remove(). While the cancel waits for any running instance of i2c_gate_work to finish, it does not prevent the timer from being rescheduled by a concurrent thread. During probe, the r820t_attach() call attempts I2C transfers through the mux adapter. These transfers go through i2c_mux_master_xfer(), which calls rtl2832_deselect() after the transfer completes, rescheduling i2c_gate_work via schedule_delayed_work(). If this transfer is still in flight when rtl2832_remove() runs, rtl2832_deselect() can reschedule i2c_gate_work after it has been cancelled, causing a use-after-free when kfree(dev) is called. Fix this by calling i2c_mux_del_adapters() before cancel_delayed_work_sync(). Once the mux adapter is unregistered, no new I2C transfers can go through it, so rtl2832_deselect() can no longer reschedule i2c_gate_work. The subsequent cancel_delayed_work_sync() is then guaranteed to be final.

Gravité et risque d'exploitation

CVE-2026-68214 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 0.22 %, ce qui la place devant 11.7 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions <=6.1.*, 7.2, <=6.12.*, <2c71bda6edc630a1f8c3c45d8df5fc22d234e042, 6.12.101, 0, <=7.1.*, cddcc40b1b1553010acb89add84c64b5d123ec94, <1e8a6bc19403661661fed5ae82f6eca6c9cdfad2, 5.15.216, <9acd5bbbe1df8e487e49488692c224496d4c9e16, <=5.10.*, <=6.6.*, 6.18.42, <68a9c0290897c1436ddceb8cea604c93377a0299, 7.1.6, <13c06056699e66ff7109ba68658cc6ea4a23f516, 6.1.183, 4.7, <=6.18.*, <24bef237eef8dd1ebcffb129ba21891ddad0d309, <=*, <680daf40a82d483949f87f0d8f98639dc47e610c, <=5.15.*, <4.7, 5.10.265, <90d781711418881f8c836c2a859cc2886625d750, 6.6.148) 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/1e8a6bc19403661661fed5ae82f6eca6c9cdfad2
• https://git.kernel.org/stable/c/68a9c0290897c1436ddceb8cea604c93377a0299
• https://git.kernel.org/stable/c/13c06056699e66ff7109ba68658cc6ea4a23f516
• https://git.kernel.org/stable/c/9acd5bbbe1df8e487e49488692c224496d4c9e16
• https://git.kernel.org/stable/c/24bef237eef8dd1ebcffb129ba21891ddad0d309
• https://git.kernel.org/stable/c/2c71bda6edc630a1f8c3c45d8df5fc22d234e042
• https://git.kernel.org/stable/c/90d781711418881f8c836c2a859cc2886625d750
• https://git.kernel.org/stable/c/680daf40a82d483949f87f0d8f98639dc47e610c