CVE-2017-16995

La función check_alu_op en kernel/bpf/verifier.c en el kernel de Linux, hasta la versión 4.4, permite que los usuarios locales provoquen una denegación de servicio (corrupción de memoria) o, posiblemente, causen otros impactos no especificados aprovechando una extensión de señal incorrecta

Jann Horn discovered that microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Meltdown. A local attacker could use this to expose sensitive information, including kernel memory. Jann Horn discovered that the Berkeley Packet Filter implementation in the Linux kernel did not properly check the relationship between pointer values and the BPF stack. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.