SB20260815129 - Use-after-free in Linux kernel sw siw driver
Published: August 15, 2026
Security Bulletin ID
SB20260815129
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-2026-74345)
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 a use-after-free in the RDMA/siw connection management endpoint handling code when processing a malformed MPA request during connection establishment. A remote attacker can send a malformed MPA request to cause a denial of service.
The issue is triggered when the new endpoint is closed during connection establishment.
Remediation
Install update from vendor's website.