CVE-2022-3564

Se ha encontrado una vulnerabilidad clasificada como crítica en el Kernel de Linux. Esta vulnerabilidad afecta a la función l2cap_reassemble_sdu del archivo net/bluetooth/l2cap_core.c del componente Bluetooth. La manipulación conlleva a un uso de memoria previamente liberada. Es recomendado aplicar un parche para corregir este problema. El identificador asociado a esta vulnerabilidad es VDB-211087

A use-after-free flaw was found in the Linux kernel’s L2CAP bluetooth functionality in how a user triggers a race condition by two malicious flows in the L2CAP bluetooth packets. This flaw allows a local or bluetooth connection user to crash the system or potentially escalate privileges.

Jann Horn discovered that the Linux kernel did not properly track memory allocations for anonymous VMA mappings in some situations, leading to potential data structure reuse. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the video4linux driver for Empia based TV cards in the Linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.