Use of uninitialized resource in Linux kernel - CVE-2022-50766
Published: December 26, 2025 / Updated: December 31, 2025
Vulnerability identifier: #VU120543
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-2022-50766
CWE-ID: CWE-908
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 use of uninitialized resource within the btrfs_init_new_buffer() function in fs/btrfs/extent-tree.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2022-50766
Install update from vendor's repository.
Linux kernel - addressed in versions 5.15.75, 5.19.17, 6.0.3, 6.1
External References
- https://git.kernel.org/stable/c/0a408c6212c16b9a2a1141d3c531247582ef8101
- https://git.kernel.org/stable/c/89bc41c92d10b905c60f6ec13c9ef664a3555c54
- https://git.kernel.org/stable/c/a687c2890fe4a2acaac6941fa4097a1264d8f3eb
- https://git.kernel.org/stable/c/cbddcc4fa3443fe8cfb2ff8e210deb1f6a0eea38
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.75
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.17
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1