#VU120734 Use-after-free in Linux kernel - CVE-2022-50843
Published: December 30, 2025 / Updated: December 31, 2025
Vulnerability identifier: #VU120734
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-2022-50843
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 clone_dtr() function in drivers/md/dm-clone-target.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/342cfd8426dff4228e6c714bcb9fc8295a2748dd
- https://git.kernel.org/stable/c/520b56cfd9faee7683f081c3a38f11a81b13a68e
- https://git.kernel.org/stable/c/856edd0e92f3fe89606b704c86a93daedddfe6ec
- https://git.kernel.org/stable/c/9e113cd4f61f3b0000843b2d0a90ce8b40a1fcff
- https://git.kernel.org/stable/c/b1ddb666073bb5f36390aaabaa1a4d48d78c52ed
- https://git.kernel.org/stable/c/e4b5957c6f749a501c464f92792f1c8e26b61a94
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.163
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.87
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.229
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.18
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2