Use-after-free in Linux kernel - CVE-2026-97992
Published: September 28, 2026
Vulnerability identifier: #VU152479
CSH Severity: Low
CVSS v4: 4.8 [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]
CVE-ID: CVE-2026-97992
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in the vhost-vdpa configuration eventfd context handling when configuration callbacks run concurrently with configuration call replacement. A local user can inject configuration interrupts while another thread replaces the configuration call file descriptor to cause a denial of service.
Reachability is described for VDUSE parent devices.
Affected software
Linux kernel
How to mitigate CVE-2026-97992
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3