NULL pointer dereference vulnerability in btrfs_verify_dev_extents in Linux kernel before 5.1

NULL pointer dereference vulnerability in btrfs_verify_dev_extents in Linux kernel before 5.1

CVE-2019-18885 · MEDIUM Severity

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

fs/btrfs/volumes.c in the Linux kernel before 5.1 allows a btrfs_verify_dev_extents NULL pointer dereference via a crafted btrfs image because fs_devices->devices is mishandled within find_device, aka CID-09ba3bc9dd15.

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