Improper locking in Linux kernel btrfs

1) Improper locking

EUVDB-ID: #VU96434

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-48901

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the btrfs_maybe_wake_unfinished_drop() and btrfs_add_dead_root() functions in fs/btrfs/transaction.c, within the btrfs_find_orphan_roots() function in fs/btrfs/root-tree.c, within the btrfs_relocate_block_group() function in fs/btrfs/relocation.c, within the btrfs_drop_snapshot() and btrfs_free_path() functions in fs/btrfs/extent-tree.c, within the open_ctree() and close_ctree() functions in fs/btrfs/disk-io.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/6599d5e8bd758d897fd2ef4dc388ae50278b1f7e
http://git.kernel.org/stable/c/5e70bc827b563caf22e1203428cc3719643de5aa
http://git.kernel.org/stable/c/b4be6aefa73c9a6899ef3ba9c5faaa8a66e333ef

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.