CVE-2026-74614 vsock/virtio: read virtqueues under worker locks
A race condition in the Linux kernel vsock driver allows workers to access deleted virtqueues, potentially causing system crashes or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74614?
CVE-2026-74614 is a high-severity vulnerability in Linux, published on 22 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
vsock/virtio: read virtqueues under worker locks
Commit bd50c5dc182b ("vsock/virtio: add support for device suspend/resume") made the *_run flags transition from false to true when restore installs replacement virtqueues. The RX, TX and event workers read their virtqueue before locking and checking the corresponding flag, so a worker delayed across freeze and restore can observe the replacement queue's running state while retaining a pointer to the deleted queue.
Read each virtqueue under its mutex after checking the run flag, keeping the pointer and state in the same queue generation.
Which versions are affected by CVE-2026-74614?
How do I fix CVE-2026-74614?
Apply the vendor's patch.
Is CVE-2026-74614 being exploited?
There is no known exploitation of CVE-2026-74614 in the wild and no public exploit code.
Sources
Also known as AZL-97226, BELL-CVE-2026-74614, DEBIAN-CVE-2026-74614, GHSA-m75m-8448-cc2j, UBUNTU-CVE-2026-74614.