SB20260625240 - Race condition in Linux kernel net wireguard driver

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260625240

SB20260625240 - Race condition in Linux kernel net wireguard driver

Published: June 25, 2026

Security Bulletin ID SB20260625240
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-52945)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 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


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.


Remediation

Install update from vendor's website.

References