CVE-2026-74613

Status: UPDATED  |  Advisory ID: CVE-2026-74613

Key Details

Affected Products, Subsystems & Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

vsock/virtio: avoid refilling the RX queue after teardown

Commit b917507e5ad9 ("vsock/virtio: stop workers during the .remove()")

made the RX worker jump to its common exit when rx_run is clear. That

exit still refills the RX queue when the buffer count is low, so work

queued across virtio_vsock_vqs_del() can add buffers after the virtqueues

have been deleted.

BUG: KASAN: slab-use-after-free in virtqueue_add_sgs

Read of size 4 by task kworker/0:1

Workqueue: virtio_vsock virtio_transport_rx_work

Call Trace:

virtqueue_add_sgs (drivers/virtio/virtio_ring.c:2796)

virtio_vsock_rx_fill (net/vmw_vsock/virtio_transport.c:332)

virtio_transport_rx_work (net/vmw_vsock/virtio_transport.c:701)

process_one_work (kernel/workqueue.c:3314)

worker_thread (kernel/workqueue.c:3478)

kthread (kernel/kthread.c:436)

ret_from_fork (arch/x86/kernel/process.c:158)

ret_from_fork_asm (arch/x86/entry/entry_64.S:245)

...

Freed by task 141:

kfree (mm/slub.c:6566)

vp_del_vq (drivers/virtio/virtio_pci_common.c:259)

vp_del_vqs (drivers/virtio/virtio_pci_common.c:285)

virtio_vsock_freeze (net/vmw_vsock/virtio_transport.c:912)

virtio_device_freeze (drivers/virtio/virtio.c:658)

virtio_pci_freeze (drivers/virtio/virtio_pci_common.c:601)

pci_pm_freeze (drivers/pci/pci-driver.c:1098)

device_suspend (drivers/base/power/main.c:1968)

Kernel panic - not syncing: KASAN: panic_on_warn set ...

Jump to a no-refill exit when rx_run is clear, leaving the normal exit

to replenish a running queue. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References