Memory leak in Linux kernel - CVE-2026-46322
Published: June 10, 2026
Vulnerability identifier: #VU134181
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-46322
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a memory leak in tun_xdp_one() when handling a build_skb() allocation failure. A local user can trigger this error path to cause a denial of service.
The issue occurs because a page allocated for the frame is not freed on the failure path, and the per-buffer error may be discarded during batch processing.
How to mitigate CVE-2026-46322
Install security update from vendor's repository.