{"api_version":"1","generated_at":"2026-07-28T12:20:14+00:00","cve":"CVE-2026-64430","urls":{"html":"https://cve.report/CVE-2026-64430","api":"https://cve.report/api/cve/CVE-2026-64430.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64430","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64430"},"summary":{"title":"NTB: epf: Avoid calling pci_irq_vector() from hardirq context","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:27","updated_at":"2026-07-27 05:16:49"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/174a97f21bf9c54fa37ec0f321692e862ea130a3","name":"https://git.kernel.org/stable/c/174a97f21bf9c54fa37ec0f321692e862ea130a3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6350df503897d57c5634f71b0767d48c3b837583","name":"https://git.kernel.org/stable/c/6350df503897d57c5634f71b0767d48c3b837583","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1dba8444ac0100133d72374634f6d7451fff1ccc","name":"https://git.kernel.org/stable/c/1dba8444ac0100133d72374634f6d7451fff1ccc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/aff271b12a1eb8c8b3da19223ae1a6abe1e8168b","name":"https://git.kernel.org/stable/c/aff271b12a1eb8c8b3da19223ae1a6abe1e8168b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/33bba331a4a5fee8b6026fe72eca13cceeec1b7b","name":"https://git.kernel.org/stable/c/33bba331a4a5fee8b6026fe72eca13cceeec1b7b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f71e8d9875069fa73e335f63f02ec6e52e3aaa51","name":"https://git.kernel.org/stable/c/f71e8d9875069fa73e335f63f02ec6e52e3aaa51","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4dcddc1c794d1c65eda68f1f8dd04a0fecc0870f","name":"https://git.kernel.org/stable/c/4dcddc1c794d1c65eda68f1f8dd04a0fecc0870f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64430","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64430","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 812ce2f8d14ea791edd88c36ebcc9017bf4c88cb 33bba331a4a5fee8b6026fe72eca13cceeec1b7b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 812ce2f8d14ea791edd88c36ebcc9017bf4c88cb aff271b12a1eb8c8b3da19223ae1a6abe1e8168b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 812ce2f8d14ea791edd88c36ebcc9017bf4c88cb 1dba8444ac0100133d72374634f6d7451fff1ccc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 812ce2f8d14ea791edd88c36ebcc9017bf4c88cb 174a97f21bf9c54fa37ec0f321692e862ea130a3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 812ce2f8d14ea791edd88c36ebcc9017bf4c88cb f71e8d9875069fa73e335f63f02ec6e52e3aaa51 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 812ce2f8d14ea791edd88c36ebcc9017bf4c88cb 6350df503897d57c5634f71b0767d48c3b837583 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 812ce2f8d14ea791edd88c36ebcc9017bf4c88cb 4dcddc1c794d1c65eda68f1f8dd04a0fecc0870f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.12","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.12 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.96 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64430","cve":"CVE-2026-64430","epss":"0.004900000","percentile":"0.392940000","score_date":"2026-07-27","updated_at":"2026-07-28 00:07:43"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/ntb/hw/epf/ntb_hw_epf.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"33bba331a4a5fee8b6026fe72eca13cceeec1b7b","status":"affected","version":"812ce2f8d14ea791edd88c36ebcc9017bf4c88cb","versionType":"git"},{"lessThan":"aff271b12a1eb8c8b3da19223ae1a6abe1e8168b","status":"affected","version":"812ce2f8d14ea791edd88c36ebcc9017bf4c88cb","versionType":"git"},{"lessThan":"1dba8444ac0100133d72374634f6d7451fff1ccc","status":"affected","version":"812ce2f8d14ea791edd88c36ebcc9017bf4c88cb","versionType":"git"},{"lessThan":"174a97f21bf9c54fa37ec0f321692e862ea130a3","status":"affected","version":"812ce2f8d14ea791edd88c36ebcc9017bf4c88cb","versionType":"git"},{"lessThan":"f71e8d9875069fa73e335f63f02ec6e52e3aaa51","status":"affected","version":"812ce2f8d14ea791edd88c36ebcc9017bf4c88cb","versionType":"git"},{"lessThan":"6350df503897d57c5634f71b0767d48c3b837583","status":"affected","version":"812ce2f8d14ea791edd88c36ebcc9017bf4c88cb","versionType":"git"},{"lessThan":"4dcddc1c794d1c65eda68f1f8dd04a0fecc0870f","status":"affected","version":"812ce2f8d14ea791edd88c36ebcc9017bf4c88cb","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/ntb/hw/epf/ntb_hw_epf.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.12"},{"lessThan":"5.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.96","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.96","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"5.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","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."}],"metrics":[{"cvssV3_1":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-07-27T05:00:51.212Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/33bba331a4a5fee8b6026fe72eca13cceeec1b7b"},{"url":"https://git.kernel.org/stable/c/aff271b12a1eb8c8b3da19223ae1a6abe1e8168b"},{"url":"https://git.kernel.org/stable/c/1dba8444ac0100133d72374634f6d7451fff1ccc"},{"url":"https://git.kernel.org/stable/c/174a97f21bf9c54fa37ec0f321692e862ea130a3"},{"url":"https://git.kernel.org/stable/c/f71e8d9875069fa73e335f63f02ec6e52e3aaa51"},{"url":"https://git.kernel.org/stable/c/6350df503897d57c5634f71b0767d48c3b837583"},{"url":"https://git.kernel.org/stable/c/4dcddc1c794d1c65eda68f1f8dd04a0fecc0870f"}],"title":"NTB: epf: Avoid calling pci_irq_vector() from hardirq context","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64430","datePublished":"2026-07-25T08:51:06.612Z","dateReserved":"2026-07-19T15:36:31.787Z","dateUpdated":"2026-07-27T05:00:51.212Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:27","lastModifiedDate":"2026-07-27 05:16:49","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64430","Ordinal":"1","Title":"NTB: epf: Avoid calling pci_irq_vector() from hardirq context","CVE":"CVE-2026-64430","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64430","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"NTB: epf: Avoid calling pci_irq_vector() from hardirq context"}]}}}