Debian LTS: DLA-2420-1 Critical Security Update for Kernel Issues

A potential out-of-bounds read was discovered in the F2FS
implementation. A user permitted to mount and access arbitrary
filesystems could potentially use this to cause a denial of
service (crash) or to read sensitive information.

CVE-2019-19073, CVE-2019-19074

Navid Emamdoost discovered potential memory leaks in the ath9k and
ath9k_htc drivers. The security impact of these is unclear.

CVE-2019-19448

"Team bobfuzzer" reported a bug in Btrfs that could lead to a
use-after-free, and could be triggered by crafted filesystem
images. A user permitted to mount and access arbitrary
filesystems could use this to cause a denial of service (crash or
memory corruption) or possibly for privilege escalation.

CVE-2020-12351

Andy Nguyen discovered a flaw in the Bluetooth implementation in
the way L2CAP packets with A2MP CID are handled. A remote attacker
within a short distance, knowing the victim's Bluetooth device