Ubuntu Security Notice 6760-1 - George-Andrei Iosif and David Fernandez Gonzalez discovered that Gerbv did not properly initialize a data structure when parsing certain nested RS-274X format files. If a user were tricked into opening a specially crafted file, an attacker could possibly use this issue to cause a denial of service.
Lonial Con discovered that the netfilter subsystem in the Linux kernel contained a memory leak when handling certain element flush operations. A local attacker could use this to expose sensitive information (kernel memory). Xingyuan Mo discovered that the netfilter subsystem in the Linux kernel did not properly handle inactive elements in its PIPAPO data structure, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.
There is yet another attack possible against Protected Media Path process beyond the one involving two global XOR keys. The new attack may also result in the extraction of a plaintext content key value.