CVE-2020-25656

Se encontró un fallo en el kernel de Linux. Se encontró un uso de la memoria previamente liberada en la manera en que el subsistema de la consola estaba usando ioctls KDGKBSENT y KDSKBSENT. Un usuario local podría usar este fallo para obtener acceso a la memoria de lectura fuera de los límites. La mayor amenaza de esta vulnerabilidad es la confidencialidad de los datos

It was discovered that the console keyboard driver in the Linux kernel contained a race condition. A local attacker could use this to expose sensitive information. Minh Yuan discovered that the tty driver in the Linux kernel contained race conditions when handling fonts. A local attacker could possibly use this to expose sensitive information. Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.