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CVE-2026-74613

vsock/virtio: avoid refilling the RX queue after teardown

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.152, 6.12.104, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From b917507e5ad983085d29069369778b16aa03a0a8 · fixed in a7658508f5fe8f1077a65e8cb9535d3426f37a2f; From b917507e5ad983085d29069369778b16aa03a0a8 · fixed in 1aa21e7c8702a7c37cd7d3cace1a652cfa5e8171; From b917507e5ad983085d29069369778b16aa03a0a8 · fixed in 4d37e3525cc346a1421c1bdeaad5848e249fc60c; From b917507e5ad983085d29069369778b16aa03a0a8 · fixed in 9d80a04129a6c27a690cb69de3fe3f50be5aa8b9; From b917507e5ad983085d29069369778b16aa03a0a8 · fixed in a309b74e3fc052352ab778500449cb9c3853c363; From b917507e5ad983085d29069369778b16aa03a0a8 · fixed in 38c7763fdc533edb34dc8f4489c260e8ba2ccae9; From b917507e5ad983085d29069369778b16aa03a0a8 · fixed in e82a5faea2e3886dfb2a65ce092a132e7e896915; From b917507e5ad983085d29069369778b16aa03a0a8 · fixed in a31e0ad444698d8aa7534a0f89fda543730f97a5

  • Linux Linux

    5.3

  • KernelLinux

    From 5.3.0 · fixed in 5.10.265; From 5.11.0 · fixed in 5.15.216; From 5.16.0 · fixed in 6.1.183; From 6.2.0 · fixed in 6.6.152; From 6.7.0 · fixed in 6.12.104; From 6.13.0 · fixed in 6.18.45; From 6.19.0 · fixed in 7.1.9

References 8

git.kernel.org