{"id":"AZL-97253","summary":"CVE-2026-74613 affecting package kernel 6.6.150.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: avoid refilling the RX queue after teardown\n\nCommit b917507e5ad9 (\"vsock/virtio: stop workers during the .remove()\")\nmade the RX worker jump to its common exit when rx_run is clear.  That\nexit still refills the RX queue when the buffer count is low, so work\nqueued across virtio_vsock_vqs_del() can add buffers after the virtqueues\nhave been deleted.\n\nBUG: KASAN: slab-use-after-free in virtqueue_add_sgs\nRead of size 4 by task kworker/0:1\nWorkqueue: virtio_vsock virtio_transport_rx_work\nCall Trace:\n virtqueue_add_sgs (drivers/virtio/virtio_ring.c:2796)\n virtio_vsock_rx_fill (net/vmw_vsock/virtio_transport.c:332)\n virtio_transport_rx_work (net/vmw_vsock/virtio_transport.c:701)\n process_one_work (kernel/workqueue.c:3314)\n worker_thread (kernel/workqueue.c:3478)\n kthread (kernel/kthread.c:436)\n ret_from_fork (arch/x86/kernel/process.c:158)\n ret_from_fork_asm (arch/x86/entry/entry_64.S:245)\n...\nFreed by task 141:\n kfree (mm/slub.c:6566)\n vp_del_vq (drivers/virtio/virtio_pci_common.c:259)\n vp_del_vqs (drivers/virtio/virtio_pci_common.c:285)\n virtio_vsock_freeze (net/vmw_vsock/virtio_transport.c:912)\n virtio_device_freeze (drivers/virtio/virtio.c:658)\n virtio_pci_freeze (drivers/virtio/virtio_pci_common.c:601)\n pci_pm_freeze (drivers/pci/pci-driver.c:1098)\n device_suspend (drivers/base/power/main.c:1968)\nKernel panic - not syncing: KASAN: panic_on_warn set ...\n\nJump to a no-refill exit when rx_run is clear, leaving the normal exit\nto replenish a running queue.","modified":"2026-08-30T05:26:50Z","published":"2026-08-22T16:16:33Z","upstream":["CVE-2026-74613"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74613"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.6.150.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-97253.json"}}],"schema_version":"1.9.0"}