#VU96434 Improper locking in Linux kernel - CVE-2022-48901
Published: August 22, 2024 / Updated: May 12, 2025
Vulnerability identifier: #VU96434
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2022-48901
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
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.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/6599d5e8bd758d897fd2ef4dc388ae50278b1f7e
- https://git.kernel.org/stable/c/5e70bc827b563caf22e1203428cc3719643de5aa
- https://git.kernel.org/stable/c/b4be6aefa73c9a6899ef3ba9c5faaa8a66e333ef
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.27
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17