243 lines
13 KiB
JSON
243 lines
13 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-2026-64430",
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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": "2026-07-19T15:36:31.787Z",
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"datePublished": "2026-07-25T08:51:06.612Z",
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"dateUpdated": "2026-08-17T04:55:30.939Z"
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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": "2026-08-17T04:55:30.939Z"
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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\nNTB: epf: Avoid calling pci_irq_vector() from hardirq context\n\nntb_epf_vec_isr() calls pci_irq_vector() in hardirq context to derive\nthe vector number. pci_irq_vector() calls msi_get_virq() that takes a\nmutex and can therefore trigger \"scheduling while atomic\" splats:\n\n BUG: scheduling while atomic: kworker/u33:0/55/0x00010001\n ...\n Call trace:\n ...\n schedule+0x38/0x110\n schedule_preempt_disabled+0x28/0x50\n __mutex_lock.constprop.0+0x848/0x908\n __mutex_lock_slowpath+0x18/0x30\n mutex_lock+0x4c/0x60\n msi_domain_get_virq+0xe8/0x138\n pci_irq_vector+0x2c/0x60\n ntb_epf_vec_isr+0x28/0x120 [ntb_hw_epf]\n __handle_irq_event_percpu+0x70/0x3a8\n handle_irq_event+0x48/0x100\n handle_edge_irq+0x100/0x1c8\n ...\n\nCache the Linux IRQ number for vector 0 when vectors are allocated and\nuse it as a base in the ISR. Running the ISR in a threaded IRQ handler\nwould also avoid the problem, but that would be unnecessary here."
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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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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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:N - Routed traffic over the standard NTB Netdev interface causes the peer host to ring the victim's PCIe MSI/MSI-X doorbell, so an unauthenticated remote sender can reach the vulnerable interrupt handler.\nAC:L - Every delivered doorbell enters the sleep-capable MSI lookup, and the attacker can repeatedly or concurrently trigger multiple allocated vectors to drive mutex contention.\nPR:N - NTB Netdev traffic and peer doorbells have no victim-side authentication or capability check, so an unauthenticated network sender needs no privileges.\nUI:N - Once the NTB link is deployed, receiving traffic automatically invokes the hardirq handler without victim user action.\nS:U - The resulting failure affects the vulnerable host kernel itself and does not cross a VM, IOMMU, or other security-authority boundary.\nC:N - The bug performs no out-of-bounds access or disclosure and provides no kernel-memory read primitive.\nI:N - The defect is an illegal sleep and mutex wait in hardirq context, with no memory corruption, arbitrary write, or data-modification primitive.\nA:H - Mutex contention in hardirq context can cause scheduling-while-atomic failures, deadlock or hang, and a kernel panic on hardened panic-on-warning systems."
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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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"drivers/ntb/hw/epf/ntb_hw_epf.c"
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],
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"versions": [
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{
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"version": "812ce2f8d14ea791edd88c36ebcc9017bf4c88cb",
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"lessThan": "33bba331a4a5fee8b6026fe72eca13cceeec1b7b",
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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": "812ce2f8d14ea791edd88c36ebcc9017bf4c88cb",
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"lessThan": "aff271b12a1eb8c8b3da19223ae1a6abe1e8168b",
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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": "812ce2f8d14ea791edd88c36ebcc9017bf4c88cb",
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"lessThan": "1dba8444ac0100133d72374634f6d7451fff1ccc",
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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": "812ce2f8d14ea791edd88c36ebcc9017bf4c88cb",
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"lessThan": "174a97f21bf9c54fa37ec0f321692e862ea130a3",
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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": "812ce2f8d14ea791edd88c36ebcc9017bf4c88cb",
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"lessThan": "f71e8d9875069fa73e335f63f02ec6e52e3aaa51",
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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": "812ce2f8d14ea791edd88c36ebcc9017bf4c88cb",
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"lessThan": "6350df503897d57c5634f71b0767d48c3b837583",
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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": "812ce2f8d14ea791edd88c36ebcc9017bf4c88cb",
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"lessThan": "4dcddc1c794d1c65eda68f1f8dd04a0fecc0870f",
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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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"drivers/ntb/hw/epf/ntb_hw_epf.c"
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],
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"versions": [
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{
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"version": "5.12",
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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": "5.12",
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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": "5.15.212",
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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": "6.1.178",
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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": "6.6.145",
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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": "6.12.96",
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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": "6.18.39",
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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": "7.1.4",
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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": "5.12",
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"versionEndExcluding": "5.15.212"
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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": "5.12",
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"versionEndExcluding": "6.1.178"
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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": "5.12",
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{
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"versionStartIncluding": "5.12",
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.12",
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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": "5.12",
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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/33bba331a4a5fee8b6026fe72eca13cceeec1b7b"
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},
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{
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"url": "https://git.kernel.org/stable/c/aff271b12a1eb8c8b3da19223ae1a6abe1e8168b"
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},
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{
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"url": "https://git.kernel.org/stable/c/1dba8444ac0100133d72374634f6d7451fff1ccc"
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},
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{
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"url": "https://git.kernel.org/stable/c/174a97f21bf9c54fa37ec0f321692e862ea130a3"
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},
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{
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"url": "https://git.kernel.org/stable/c/f71e8d9875069fa73e335f63f02ec6e52e3aaa51"
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},
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{
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"url": "https://git.kernel.org/stable/c/6350df503897d57c5634f71b0767d48c3b837583"
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},
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{
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"url": "https://git.kernel.org/stable/c/4dcddc1c794d1c65eda68f1f8dd04a0fecc0870f"
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}
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],
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"title": "NTB: epf: Avoid calling pci_irq_vector() from hardirq context",
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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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} |