SB20251230178 - Use-after-free in Linux kernel mt76 mt7921 driver
Published: December 30, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251230178
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-2022-50852)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the mt7921_acpi_read() function in drivers/net/wireless/mediatek/mt76/mt7921/acpi_sar.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.