SB2025100306 - Use-after-free in Linux kernel firmware efi driver
Published: October 3, 2025 Updated: October 27, 2025
Security Bulletin ID
SB2025100306
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-2022-50433)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the efivar_ssdt_load() function in drivers/firmware/efi/efi.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.