CVE-2026-74614

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.

References

• https://git.kernel.org/stable/c/1cecb4202afdbeddcf29d59baf596ac6ab753f7f
• https://git.kernel.org/stable/c/29dd10583bf9d2744cd84b862e4257c0a5699570
• https://git.kernel.org/stable/c/941329ce14c5f481223a10d1d4c8b57ea7f3048a
• https://git.kernel.org/stable/c/a1fb0c5b8a7c2753758aeced40971f99449dde0c
• https://git.kernel.org/stable/c/bd43a7ec668be428265b3209eb43647aedcf720a
• https://git.kernel.org/stable/c/eae099c764c7ebdb842eb1f638913e310bdd6513
• https://git.kernel.org/stable/c/ebac8f6b1ef0e9278afe204b8692a7479988dace