Slab-out-of-bounds Write Access Vulnerability in Btrfs Filesystem Image Mounting

Slab-out-of-bounds Write Access Vulnerability in Btrfs Filesystem Image Mounting

CVE-2019-19816 · HIGH Severity

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image and performing some operations can cause slab-out-of-bounds write access in __btrfs_map_block in fs/btrfs/volumes.c, because a value of 1 for the number of data stripes is mishandled.

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