Race condition in Linux kernel - CVE-2026-80896
Published: September 5, 2026
Vulnerability identifier: #VU147027
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80896
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause list corruption.
The vulnerability exists due to improper synchronization and improper list-node state handling in mshv_irqfd_deassign() and mshv_irqfd_deactivate() when concurrently deassigning irqfds and processing EPOLLHUP events. A local user can trigger repeated removal of the same irqfd list node to cause list corruption.
Affected software
Linux kernel
How to mitigate CVE-2026-80896
Install security update from vendor's repository.