CVE-2022-21499

KGDB y KDB permiten el acceso de lectura y escritura a la memoria del kernel, y por lo tanto deben ser restringidos durante el bloqueo. Un atacante con acceso a un puerto serie podría activar el depurador, por lo que es importante que el depurador respete el modo de bloqueo cuando/si se activa. Puntuación de base 6.7, CVSS 3.1 (impactos en la confidencialidad, integridad y disponibilidad). Vector CVSS: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)

A flaw was found in the kernel/debug/debug_core.c in the Linux kernel in lockdown mode. This flaw allows an attacker with local access to trigger the debugger, bypass lockdown and write anonymously.

It was discovered that a race condition existed in the network scheduling subsystem of the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Yiqi Sun and Kevin Wang discovered that the cgroups implementation in the Linux kernel did not properly restrict access to the cgroups v1 release_agent feature. A local attacker could use this to gain administrative privileges. Various other issues were also addressed.