SB20260912393 - Use-after-free in Linux kernel smc
Published: September 12, 2026
Security Bulletin ID
SB20260912393
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-80981)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to use-after-free in smc_llc_srv_add_link() when processing an SMC add-link request without a shared v2 receive buffer. A remote attacker can trigger SMC add-link handling to cause a denial of service.
Remediation
Install update from vendor's website.