CVE-2016-2085

La función evm_verify_hmac en security/integrity/evm/evm_main.c en el kernel de Linux en versiones anteriores a 4.5 no copia correctamente los datos, lo que facilita a usuarios locales falsificar los valores MAC a través de un ataque de tiempo side-chanel.

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.