Race condition in Linux kernel - CVE-2026-23473
Published: April 6, 2026
Vulnerability identifier: #VU124896
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-23473
CWE-ID: CWE-362
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 improper handling of a wakeup race in io_uring multishot recv polling when processing socket wakeups and shutdown state changes. A local user can trigger back-to-back socket send and shutdown events to cause a denial of service.
The issue can cause the multishot recv operation to hang indefinitely because the shutdown event may be lost and no further wakeups occur.
How to mitigate CVE-2026-23473
Install security update from vendor's repository.