363 lines
19 KiB
JSON
363 lines
19 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-2024-56704",
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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": "2024-12-27T15:00:39.856Z",
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"datePublished": "2024-12-28T09:46:25.766Z",
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"dateUpdated": "2026-08-05T11:46:10.332Z"
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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": "2026-08-05T11:46:10.332Z"
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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\n9p/xen: fix release of IRQ\n\nKernel logs indicate an IRQ was double-freed.\n\nPass correct device ID during IRQ release.\n\n[Dominique: remove confusing variable reset to 0]"
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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 Xen 9pfs frontend is reached through hypervisor-mediated grant-shared rings, event channels and xenstore state transitions, not through the network stack, so the attack path is a local read/write/signal channel into the guest kernel rather than a network protocol. Guest-side triggering (driver unbind, device teardown) is likewise local.\nAC:L - The wrong-dev_id `free_irq()` fails deterministically on every single ring teardown, so the WARN, the leaked irqaction and the missing `synchronize_irq()` barrier are guaranteed, and the attacker controls both sides of the resulting race by choosing when to drive the device to Closing/removal while continuously notifying the event channel. No condition lies outside the attacker's influence.\nPR:N - The realistic attacker is a compromised or malicious 9pfs backend/driver domain, which in Xen's disaggregated threat model holds zero privileges within the victim guest kernel yet fully controls the xenbus state transitions and event-channel notifications needed to trigger and race the teardown.\nUI:N - Device teardown is driven entirely by backend-initiated xenbus state changes and requires no action from any user in the guest; having a 9pfs device attached is a configuration precondition, not victim interaction.\nS:U - The corrupted memory and the resulting control-flow impact are all inside the victim guest's own Linux kernel, so the vulnerable and impacted components share one security authority; no VM-escape, IOMMU or sandbox boundary is crossed by the flaw itself.\nC:H - Because `synchronize_irq()` is skipped, `xen_9pfs_front_event_handler()` and the subsequently queued `p9_xen_response()` read `ring->priv->client`, `ring->intf`, `ring->data.in` and the `p9_client`/`p9_req_t` structures after `kfree(priv->rings)`/`kfree(priv)`, giving a use-after-free read over reclaimable kernel heap contents, which per guidance is High.\nI:H - `schedule_work(&ring->work)` writes workqueue list pointers into the freed `xen_9pfs_dataring` allocation and later executes `p9_xen_response()` against attacker-reclaimable memory including the `p9_client` and its callback state, yielding a use-after-free write and control-flow hijack primitive suitable for privilege escalation inside the guest.\nA:H - Every teardown hits `WARN(1, \"Trying to free already-free IRQ\")`, which is an immediate panic under `panic_on_warn`, and the descriptor is freed with a live irqaction attached while the ring memory is released underneath a possibly-running handler, producing oopses and slab corruption; each cycle additionally leaks the `struct irqaction` and its module/PM references."
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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/9p/trans_xen.c"
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],
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"versions": [
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{
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"version": "71ebd71921e451f0f942ddfe85d01e31ddc6eb88",
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"lessThan": "692eb06703afc3e24d889d77e94a0e20229f6a4a",
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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": "71ebd71921e451f0f942ddfe85d01e31ddc6eb88",
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"lessThan": "d74b4b297097bd361b8a9abfde9b521ff464ea9c",
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"status": "affected",
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},
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{
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"lessThan": "7f5a2ed5c1810661e6b03f5a4ebf17682cdea850",
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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": "71ebd71921e451f0f942ddfe85d01e31ddc6eb88",
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"lessThan": "4950408793b118cb8075bcee1f033b543fb719fa",
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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": "71ebd71921e451f0f942ddfe85d01e31ddc6eb88",
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"lessThan": "b9e26059664bd9ebc64a0e8f5216266fc9f84265",
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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": "71ebd71921e451f0f942ddfe85d01e31ddc6eb88",
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"lessThan": "2bb3ee1bf237557daea1d58007d2e1d4a6502ccf",
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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": "71ebd71921e451f0f942ddfe85d01e31ddc6eb88",
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"lessThan": "d888f5f5d76b2722c267e6bdf51d445d60647b7b",
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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": "71ebd71921e451f0f942ddfe85d01e31ddc6eb88",
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"lessThan": "530bc9f03a102fac95b07cda513bfc16ff69e0ee",
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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": "71ebd71921e451f0f942ddfe85d01e31ddc6eb88",
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"lessThan": "e43c608f40c065b30964f0a806348062991b802d",
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"status": "affected",
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"versionType": "git"
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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/9p/trans_xen.c"
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],
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"versions": [
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{
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"version": "4.12",
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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": "4.12",
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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": "4.19.325",
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"lessThanOrEqual": "4.19.*",
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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": "5.4.287",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.231",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.174",
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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": "6.1.120",
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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": "6.6.64",
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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": "6.11.11",
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"lessThanOrEqual": "6.11.*",
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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": "6.12.2",
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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": "6.13",
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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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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"versionStartIncluding": "4.12",
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"versionEndExcluding": "4.19.325"
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"vulnerable": true,
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{
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"url": "https://git.kernel.org/stable/c/692eb06703afc3e24d889d77e94a0e20229f6a4a"
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},
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{
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"url": "https://git.kernel.org/stable/c/d74b4b297097bd361b8a9abfde9b521ff464ea9c"
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},
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{
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"url": "https://git.kernel.org/stable/c/7f5a2ed5c1810661e6b03f5a4ebf17682cdea850"
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},
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{
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"url": "https://git.kernel.org/stable/c/4950408793b118cb8075bcee1f033b543fb719fa"
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},
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{
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"url": "https://git.kernel.org/stable/c/b9e26059664bd9ebc64a0e8f5216266fc9f84265"
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},
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{
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"url": "https://git.kernel.org/stable/c/2bb3ee1bf237557daea1d58007d2e1d4a6502ccf"
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},
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{
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"url": "https://git.kernel.org/stable/c/d888f5f5d76b2722c267e6bdf51d445d60647b7b"
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},
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{
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"url": "https://git.kernel.org/stable/c/530bc9f03a102fac95b07cda513bfc16ff69e0ee"
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},
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{
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"url": "https://git.kernel.org/stable/c/e43c608f40c065b30964f0a806348062991b802d"
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}
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],
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"title": "9p/xen: fix release of IRQ",
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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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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.8,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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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-2024-56704",
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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": "2025-10-01T19:58:47.879822Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-415",
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"description": "CWE-415 Double Free"
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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": "2025-10-01T20:07:07.289Z"
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T20:52:55.105Z"
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}
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}
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]
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}
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} |