{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74614","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-15T05:44:03.920Z","datePublished":"2026-08-22T15:31:59.800Z","dateUpdated":"2026-08-25T05:40:40.984Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-25T05:40:40.984Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: read virtqueues under worker locks\n\nCommit bd50c5dc182b (\"vsock/virtio: add support for device\nsuspend/resume\") made the *_run flags transition from false to true when\nrestore installs replacement virtqueues.  The RX, TX and event workers\nread their virtqueue before locking and checking the corresponding flag,\nso a worker delayed across freeze and restore can observe the replacement\nqueue's running state while retaining a pointer to the deleted queue.\n\nRead each virtqueue under its mutex after checking the run flag, keeping\nthe pointer and state in the same queue generation."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.4,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The bug is in the guest virtio-vsock driver reached via AF_VSOCK sockets and virtio virtqueue completions, not via routable network protocols; per kernel CNA guidance vsock and virtio guest-driver bugs are scored Local even when the hypervisor is the peer.\nAC:L - An attacker or malicious host controls both sides of the race by flooding vsock/virtqueue traffic to queue RX/TX/event workers while virtio_vsock_freeze/restore deletes and replaces virtqueues, making the stale pre-lock virtqueue pointer race reliable and repeatable.\nPR:N - No guest privileges are required in the highest-impact scenario: a malicious hypervisor or host-initiated suspend/migrate triggers freeze/restore while virtio completions queue workers, matching confidential-computing models where the host is untrusted and holds no guest credentials.\nUI:N - Vulnerable RX/TX/event workers run automatically from virtqueue IRQ callbacks on a dedicated workqueue; no victim must mount filesystems, open files, or take deliberate action beyond normal virtio-vsock device operation and VM lifecycle events.\nS:U - Corruption is confined to the guest kernel virtio-vsock driver; exploited impact stays within the guest security boundary and does not cross to the hypervisor (guest-to-host escape would involve vhost-vsock on the host, not this guest-side driver).\nC:H - Use-after-free of a deleted virtqueue: virtqueue_disable_cb, virtqueue_get_buf, and virtqueue_enable_cb dereference freed vring_virtqueue slab memory, enabling attacker-controlled reuse and arbitrary kernel memory disclosure typical of virtio UAF bugs.\nI:H - Corrupted virtqueue metadata permits out-of-bounds ring/index manipulation and further virtqueue operations, furnishing heap corruption and arbitrary-write primitives suitable for guest ring-0 code execution and privilege escalation.\nA:H - Operating on freed virtqueues triggers KASAN slab-use-after-free and kernel BUG/oops/panic (as in the related virtio-vsock freeze bug CVE-2026-74613), fully denying guest availability even when full exploitation is not attempted."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/vmw_vsock/virtio_transport.c"],"versions":[{"version":"762c251c7f5c4ee5bef71460c6e822ed293fd69f","lessThan":"941329ce14c5f481223a10d1d4c8b57ea7f3048a","status":"affected","versionType":"git"},{"version":"bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c","lessThan":"29dd10583bf9d2744cd84b862e4257c0a5699570","status":"affected","versionType":"git"},{"version":"bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c","lessThan":"a1fb0c5b8a7c2753758aeced40971f99449dde0c","status":"affected","versionType":"git"},{"version":"bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c","lessThan":"eae099c764c7ebdb842eb1f638913e310bdd6513","status":"affected","versionType":"git"},{"version":"bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c","lessThan":"bd43a7ec668be428265b3209eb43647aedcf720a","status":"affected","versionType":"git"},{"version":"bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c","lessThan":"1cecb4202afdbeddcf29d59baf596ac6ab753f7f","status":"affected","versionType":"git"},{"version":"bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c","lessThan":"ebac8f6b1ef0e9278afe204b8692a7479988dace","status":"affected","versionType":"git"},{"version":"5.15.138","lessThan":"5.15.216","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/vmw_vsock/virtio_transport.c"],"versions":[{"version":"5.19","status":"affected"},{"version":"0","lessThan":"5.19","status":"unaffected","versionType":"semver"},{"version":"5.15.216","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.152","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.104","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.45","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.9","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.138","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.6.152"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.12.104"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.18.45"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.1.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/941329ce14c5f481223a10d1d4c8b57ea7f3048a"},{"url":"https://git.kernel.org/stable/c/29dd10583bf9d2744cd84b862e4257c0a5699570"},{"url":"https://git.kernel.org/stable/c/a1fb0c5b8a7c2753758aeced40971f99449dde0c"},{"url":"https://git.kernel.org/stable/c/eae099c764c7ebdb842eb1f638913e310bdd6513"},{"url":"https://git.kernel.org/stable/c/bd43a7ec668be428265b3209eb43647aedcf720a"},{"url":"https://git.kernel.org/stable/c/1cecb4202afdbeddcf29d59baf596ac6ab753f7f"},{"url":"https://git.kernel.org/stable/c/ebac8f6b1ef0e9278afe204b8692a7479988dace"}],"title":"vsock/virtio: read virtqueues under worker locks","x_generator":{"engine":"bippy-1.2.0"}}}}