Race condition in Linux kernel - CVE-2026-52945
Published: June 25, 2026
Vulnerability identifier: #VU135429
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-52945
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper state management in the WireGuard receive queue and NAPI handling logic when processing encrypted network packets under heavy networking load. A remote attacker can send network traffic that triggers a stalled decryption state for a WireGuard peer to cause a denial of service.
Only the decryption side for an affected WireGuard peer is impacted, and once triggered the condition does not recover automatically.
How to mitigate CVE-2026-52945
Install security update from vendor's repository.