SB2026091863 - Use-after-free in Linux kernel hw irdma driver
Published: September 18, 2026
Security Bulletin ID
SB2026091863
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-93154)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to missing reference counting in the Intel irdma driver's user ring memory-region handling when deregistering a memory region backing QP, CQ, or SRQ rings. A local user can deregister a memory region associated with a user ring to cause a denial of service.
Remediation
Install update from vendor's website.