CVE-2019-19816

Name of the Vulnerable Software and Affected Versions Linux kernel version 5.0.21

Description The issue is related to a buffer overflow in the btrfs map block function of the Linux kernel, specifically when handling a crafted btrfs filesystem image with a certain configuration. This can lead to a slab-out-of-bounds write access, potentially causing a denial of service. The problem arises when the number of data stripes is set to 1, which is mishandled by the btrfs map block function in fs/btrfs/volumes.c.

Recommendations For Linux kernel version 5.0.21, consider disabling the btrfs map block function or restricting access to the btrfs filesystem until a patch is available. Avoid mounting crafted btrfs filesystem images to minimize the risk of exploitation.