#VU111529 Use-after-free in Linux kernel - CVE-2022-49999
Published: June 20, 2025 / Updated: June 21, 2025
Vulnerability identifier: #VU111529
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2022-49999
CWE-ID: CWE-416
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 escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the btrfs_pin_extent_for_log_replay(), __exclude_logged_extent(), btrfs_block_group_done() and btrfs_trim_fs() functions in fs/btrfs/extent-tree.c, within the btrfs_wait_block_group_cache_progress(), btrfs_put_block_group(), btrfs_cache_block_group() and btrfs_update_block_group() functions in fs/btrfs/block-group.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/92dc4c1a8e58bcc7a183a4c86b055c24cc88d967
- https://git.kernel.org/stable/c/a2e54eb64229f07f917b05d0c323604fda9b89f7
- https://git.kernel.org/stable/c/ced8ecf026fd8084cf175530ff85c76d6085d715
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.65
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0