NULL pointer dereference in Linux kernel - CVE-2022-49831
Published: May 2, 2025 / Updated: May 10, 2025
Vulnerability identifier: #VU108287
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2022-49831
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the btrfs_init_devices_late() function in fs/btrfs/volumes.c, within the btrfs_read_roots() function in fs/btrfs/disk-io.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2022-49831
Install update from vendor's website.
Linux kernel - addressed in versions 5.15.79, 6.0.9, 6.1
External References
- https://git.kernel.org/stable/c/544f38a738343d7e75f104e5e9d1ade58d8b71bd
- https://git.kernel.org/stable/c/91c38504e589dadbcde47b1cacdfc5b684154d44
- https://git.kernel.org/stable/c/a8d1b1647bf8244a5f270538e9e636e2657fffa3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.79
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.9
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1