vsock/virtio: avoid refilling the RX queue after teardown

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74613
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:33 UTC
Updated2026-08-22 16:16:33 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b917507e5ad983085d29069369778b16aa03a0a8 a7658508f5fe8f1077a65e8cb9535d3426f37a2f git Not specified
CNA Linux Linux affected b917507e5ad983085d29069369778b16aa03a0a8 1aa21e7c8702a7c37cd7d3cace1a652cfa5e8171 git Not specified
CNA Linux Linux affected b917507e5ad983085d29069369778b16aa03a0a8 4d37e3525cc346a1421c1bdeaad5848e249fc60c git Not specified
CNA Linux Linux affected b917507e5ad983085d29069369778b16aa03a0a8 9d80a04129a6c27a690cb69de3fe3f50be5aa8b9 git Not specified
CNA Linux Linux affected b917507e5ad983085d29069369778b16aa03a0a8 a309b74e3fc052352ab778500449cb9c3853c363 git Not specified
CNA Linux Linux affected b917507e5ad983085d29069369778b16aa03a0a8 38c7763fdc533edb34dc8f4489c260e8ba2ccae9 git Not specified
CNA Linux Linux affected b917507e5ad983085d29069369778b16aa03a0a8 e82a5faea2e3886dfb2a65ce092a132e7e896915 git Not specified
CNA Linux Linux affected b917507e5ad983085d29069369778b16aa03a0a8 a31e0ad444698d8aa7534a0f89fda543730f97a5 git Not specified
CNA Linux Linux affected 5.3 Not specified
CNA Linux Linux unaffected 5.3 semver Not specified
CNA Linux Linux unaffected 5.10.265 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.216 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.183 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.152 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.104 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.45 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e82a5faea2e3886dfb2a65ce092a132e7e896915 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9d80a04129a6c27a690cb69de3fe3f50be5aa8b9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/38c7763fdc533edb34dc8f4489c260e8ba2ccae9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1aa21e7c8702a7c37cd7d3cace1a652cfa5e8171 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a7658508f5fe8f1077a65e8cb9535d3426f37a2f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a31e0ad444698d8aa7534a0f89fda543730f97a5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a309b74e3fc052352ab778500449cb9c3853c363 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4d37e3525cc346a1421c1bdeaad5848e249fc60c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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