CVE-2023-6932

Una vulnerabilidad de use after free en el componente ipv4: igmp del kernel de Linux se puede explotar para lograr una escalada de privilegios local. Se puede aprovechar una condición de ejecución para provocar que un temporizador se registre por error en un objeto bloqueado de lectura de RCU que es liberado por otro subproceso. Recomendamos actualizar el commit anterior e2b706c691905fe78468c361aaabc719d0a496f1.

A race condition has been discovered in the Linux kernel's Internet Group Management Protocol (IGMP) implementation. This vulnerability may enable an attacker to provoke an application crash or potentially escalate privileges locally. By exploiting the race condition, an adversary could disrupt the normal operation of affected systems, leading to service disruption or, in the worst case, unauthorized access to sensitive resources.

It was discovered that the CIFS network file system implementation in the Linux kernel did not properly validate the server frame size in certain situation, leading to an out-of-bounds read vulnerability. An attacker could use this to construct a malicious CIFS image that, when operated on, could cause a denial of service or possibly expose sensitive information. Budimir Markovic, Lucas De Marchi, and Pengfei Xu discovered that the perf subsystem in the Linux kernel did not properly validate all event sizes when attaching new events, leading to an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.