Memory leak in Linux kernel - CVE-2026-90065
Published: September 19, 2026
Vulnerability identifier: #VU151416
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90065
CWE-ID: CWE-401
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 a memory leak in IPPROTO_SMC socket initialization when socket creation fails after initialization. A local user can repeatedly create failing IPPROTO_SMC sockets to cause a denial of service.
Exploitation requires the ability to attach a deny-all BPF_CGROUP_INET_SOCK_CREATE program to the user's own cgroup.
Affected software
Linux kernel
How to mitigate CVE-2026-90065
Install security update from vendor's repository.