SB2025120856 - Use-after-free in Linux kernel mm
Published: December 8, 2025 Updated: December 12, 2025
Security Bulletin ID
SB2025120856
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-2022-50630)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the hugetlb_handle_userfault(), hugetlb_no_page() and hugetlb_fault() functions in mm/hugetlb.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0db2efb3bff879566f05341d94c3de00ac95c4cc
- https://git.kernel.org/stable/c/45c33966759ea1b4040c08dacda99ef623c0ca29
- https://git.kernel.org/stable/c/78504bcedb2f1bbfb353b4d233c24d641c4dda33
- https://git.kernel.org/stable/c/958f32ce832ba781ac20e11bb2d12a9352ea28fc
- https://git.kernel.org/stable/c/dd691973f67b2800a97db723b1ff6f07fdcf7f5a
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.17