283 lines
15 KiB
JSON
283 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-74614",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-15T05:44:03.920Z",
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"datePublished": "2026-08-22T15:31:59.800Z",
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"dateUpdated": "2026-10-16T19:06:01.847Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-25T05:40:40.984Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.4,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/vmw_vsock/virtio_transport.c"
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],
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"versions": [
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{
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"version": "762c251c7f5c4ee5bef71460c6e822ed293fd69f",
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"lessThan": "941329ce14c5f481223a10d1d4c8b57ea7f3048a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c",
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"lessThan": "29dd10583bf9d2744cd84b862e4257c0a5699570",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c",
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"lessThan": "a1fb0c5b8a7c2753758aeced40971f99449dde0c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c",
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"lessThan": "eae099c764c7ebdb842eb1f638913e310bdd6513",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c",
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"lessThan": "bd43a7ec668be428265b3209eb43647aedcf720a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c",
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"lessThan": "1cecb4202afdbeddcf29d59baf596ac6ab753f7f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c",
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"lessThan": "ebac8f6b1ef0e9278afe204b8692a7479988dace",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5.15.138",
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"lessThan": "5.15.216",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/vmw_vsock/virtio_transport.c"
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],
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"versions": [
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{
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"version": "5.19",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.19",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.216",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.183",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.152",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.104",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.45",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.9",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.15.138",
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"versionEndExcluding": "5.15.216"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.19",
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"versionEndExcluding": "6.1.183"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.19",
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"versionEndExcluding": "6.6.152"
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{
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"versionEndExcluding": "6.12.104"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.19",
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"versionEndExcluding": "6.18.45"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.19",
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"versionEndExcluding": "7.2"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/941329ce14c5f481223a10d1d4c8b57ea7f3048a"
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},
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{
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"url": "https://git.kernel.org/stable/c/29dd10583bf9d2744cd84b862e4257c0a5699570"
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},
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{
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"url": "https://git.kernel.org/stable/c/a1fb0c5b8a7c2753758aeced40971f99449dde0c"
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},
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{
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"url": "https://git.kernel.org/stable/c/eae099c764c7ebdb842eb1f638913e310bdd6513"
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},
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{
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"url": "https://git.kernel.org/stable/c/bd43a7ec668be428265b3209eb43647aedcf720a"
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},
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{
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"url": "https://git.kernel.org/stable/c/1cecb4202afdbeddcf29d59baf596ac6ab753f7f"
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},
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{
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"url": "https://git.kernel.org/stable/c/ebac8f6b1ef0e9278afe204b8692a7479988dace"
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}
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],
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"title": "vsock/virtio: read virtqueues under worker locks",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-74614",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T19:02:27.223007Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-16T19:06:01.847Z"
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}
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}
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]
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}
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} |