SB20251230179 - Use-after-free in Linux kernel md driver
Published: December 30, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251230179
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2022-50843)
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 website.
References
- 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