Use-after-free in Linux kernel - CVE-2026-93154
Published: September 18, 2026
Vulnerability identifier: #VU150854
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-93154
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-93154
Install security update from vendor's repository.