CVE-2020-9383

Se detectó un problema en el kernel de Linux versión 3.16 hasta la versión 5.5.6. La función set_fdc en el archivo drivers/block/floppy.c, conlleva a una lectura fuera de límites de wait_til_ready porque el índice FDC no es comprobado para errores antes de asignarlos, también se conoce como CID-2e90ca68b0d2

An out-of-bounds (OOB) memory access flaw was found in the floppy driver module in the Linux kernel. A bounds check failure allows a local attacker to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.

Al Viro discovered that the Linux kernel for s390x systems did not properly perform page table upgrades for kernel sections that use secondary address mode. A local attacker could use this to cause a denial of service or execute arbitrary code. It was discovered that the Intel Wi-Fi driver in the Linux kernel did not properly check for errors in some situations. A local attacker could possibly use this to cause a denial of service. Various other issues were also addressed.