SB2025102136 - Use-after-free in Linux kernel smc
Published: October 21, 2025
Security Bulletin ID
SB2025102136
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-2025-40012)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the smc_lo_register_dmb() and __smc_lo_unregister_dmb() functions in net/smc/smc_loopback.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.