CVE-2020-27194

Se detectó un problema en el kernel de Linux versiones anteriores a 5.8.15. La función scalar32_min_max_or en el archivo kernel/bpf/verifier.c, maneja inapropiadamente el seguimiento de límites durante el uso de valores de 64 bits, también se conoce como CID-5b9fbeb75b6a

Simon Scannell discovered that the bpf verifier in the Linux kernel did not properly calculate register bounds for certain operations. A local attacker could use this to expose sensitive information or gain administrative privileges. Moritz Lipp, Michael Schwarz, Andreas Kogler, David Oswald, Catherine Easdon, Claudio Canella, and Daniel Gruss discovered that the Intel Running Average Power Limit driver in the Linux kernel did not properly restrict access to power data. A local attacker could possibly use this to expose sensitive information. Various other issues were also addressed.