CVE-2016-2550

El kernel de Linux en versiones anteriores a 4.5 permite a usuarios locales eludir los límites del archivo descriptor y causar una denegación de servicio (consumo de memoria) mediante el aprovechamiento del incorrecto seguimiento de la propiedad del descriptor y enviando cada descriptor a través de un socket UNIX antes de cerrarlo. NOTA: esta vulnerabilidad existe debido a una solución incorrecta para CVE-2013-4312.

Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux Extended Verification Module (EVM). An attacker could use this to affect system integrity. David Herrmann discovered that the Linux kernel incorrectly accounted file descriptors to the original opener for in-flight file descriptors sent over a unix domain socket. A local attacker could use this to cause a denial of service (resource exhaustion). Various other issues were also addressed.