{"api_version":"1","generated_at":"2026-08-18T23:39:07+00:00","cve":"CVE-2026-72409","urls":{"html":"https://cve.report/CVE-2026-72409","api":"https://cve.report/api/cve/CVE-2026-72409.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72409","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72409"},"summary":{"title":"net: mvneta: re-enable percpu interrupt on resume","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mvneta: re-enable percpu interrupt on resume\n\nOn Marvell MPIC platforms (Armada 370/XP/38x), mvneta uses a percpu\nIRQ disable/enable scheme for NAPI: the ISR (mvneta_percpu_isr) calls\ndisable_percpu_irq() to mask the MPIC per-CPU interrupt and schedules\nNAPI poll, which calls enable_percpu_irq() on completion to unmask.\n\nIf suspend occurs while NAPI poll is pending (between\ndisable_percpu_irq in the ISR and enable_percpu_irq in poll\ncompletion), the interrupt is never re-enabled:\n\n  1. mvneta_percpu_isr: disable_percpu_irq() + napi_schedule()\n     => MPIC masked, percpu_enabled cpumask bit cleared\n  2. NAPI poll does not complete before suspend proceeds\n     (on PREEMPT_RT this is highly likely since softirqs run in\n     ksoftirqd which gets frozen; on non-RT it can happen when\n     softirq processing is deferred to ksoftirqd)\n  3. mvneta_stop_dev => napi_disable(): cancels the pending poll\n     without executing the completion path\n  4. suspend_device_irqs => IRQCHIP_MASK_ON_SUSPEND: masks MPIC\n     (already masked, but records IRQS_SUSPENDED)\n  5. Resume: mpic_resume checks irq_percpu_is_enabled() => false\n     (bit was cleared in step 1) => skips unmask\n  6. mvneta_start_dev only restores device-level INTR_NEW_MASK,\n     does not touch the MPIC per-CPU mask\n\nResult: MPIC per-CPU interrupt stays masked permanently. The NIC\ngenerates interrupts (INTR_NEW_CAUSE != 0) but the CPU never\nreceives them, causing complete loss of network connectivity.\n\nFix by calling on_each_cpu(mvneta_percpu_enable) in the resume path\nto unconditionally unmask the MPIC per-CPU interrupt regardless of\npre-suspend state.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:14","updated_at":"2026-08-17 06:19:07"},"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/5bdb33ff6e58bdc43632e98b30723eb65352d671","name":"https://git.kernel.org/stable/c/5bdb33ff6e58bdc43632e98b30723eb65352d671","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/be626ac1faadd49c2cead9f9cd06ba8752d81563","name":"https://git.kernel.org/stable/c/be626ac1faadd49c2cead9f9cd06ba8752d81563","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8c7a489aa71d2693752b2e794a68bf672d16c829","name":"https://git.kernel.org/stable/c/8c7a489aa71d2693752b2e794a68bf672d16c829","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/82c13027ed283b856017adee970dbfdffce5c6b8","name":"https://git.kernel.org/stable/c/82c13027ed283b856017adee970dbfdffce5c6b8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b84dd48f9da1eb132bdc06a944423cd5a1641ef1","name":"https://git.kernel.org/stable/c/b84dd48f9da1eb132bdc06a944423cd5a1641ef1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1cc312dc8bc78fa24c80d5bc193dbf5b57a99cc6","name":"https://git.kernel.org/stable/c/1cc312dc8bc78fa24c80d5bc193dbf5b57a99cc6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bf88cd3b649bc3e638f1e8a77649581852747a68","name":"https://git.kernel.org/stable/c/bf88cd3b649bc3e638f1e8a77649581852747a68","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fd398d6480987e4c84fff0aaab6b9d6642a93343","name":"https://git.kernel.org/stable/c/fd398d6480987e4c84fff0aaab6b9d6642a93343","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72409","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72409","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12bb03b436dad56692e9a103ed26156156bef5d2 bf88cd3b649bc3e638f1e8a77649581852747a68 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12bb03b436dad56692e9a103ed26156156bef5d2 8c7a489aa71d2693752b2e794a68bf672d16c829 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12bb03b436dad56692e9a103ed26156156bef5d2 82c13027ed283b856017adee970dbfdffce5c6b8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12bb03b436dad56692e9a103ed26156156bef5d2 be626ac1faadd49c2cead9f9cd06ba8752d81563 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12bb03b436dad56692e9a103ed26156156bef5d2 1cc312dc8bc78fa24c80d5bc193dbf5b57a99cc6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12bb03b436dad56692e9a103ed26156156bef5d2 b84dd48f9da1eb132bdc06a944423cd5a1641ef1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12bb03b436dad56692e9a103ed26156156bef5d2 5bdb33ff6e58bdc43632e98b30723eb65352d671 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12bb03b436dad56692e9a103ed26156156bef5d2 fd398d6480987e4c84fff0aaab6b9d6642a93343 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.4","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.4 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.261 5.10.* 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 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"72409","cve":"CVE-2026-72409","epss":"0.006860000","percentile":"0.496300000","score_date":"2026-08-17","updated_at":"2026-08-18 00:11:47"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ethernet/marvell/mvneta.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"bf88cd3b649bc3e638f1e8a77649581852747a68","status":"affected","version":"12bb03b436dad56692e9a103ed26156156bef5d2","versionType":"git"},{"lessThan":"8c7a489aa71d2693752b2e794a68bf672d16c829","status":"affected","version":"12bb03b436dad56692e9a103ed26156156bef5d2","versionType":"git"},{"lessThan":"82c13027ed283b856017adee970dbfdffce5c6b8","status":"affected","version":"12bb03b436dad56692e9a103ed26156156bef5d2","versionType":"git"},{"lessThan":"be626ac1faadd49c2cead9f9cd06ba8752d81563","status":"affected","version":"12bb03b436dad56692e9a103ed26156156bef5d2","versionType":"git"},{"lessThan":"1cc312dc8bc78fa24c80d5bc193dbf5b57a99cc6","status":"affected","version":"12bb03b436dad56692e9a103ed26156156bef5d2","versionType":"git"},{"lessThan":"b84dd48f9da1eb132bdc06a944423cd5a1641ef1","status":"affected","version":"12bb03b436dad56692e9a103ed26156156bef5d2","versionType":"git"},{"lessThan":"5bdb33ff6e58bdc43632e98b30723eb65352d671","status":"affected","version":"12bb03b436dad56692e9a103ed26156156bef5d2","versionType":"git"},{"lessThan":"fd398d6480987e4c84fff0aaab6b9d6642a93343","status":"affected","version":"12bb03b436dad56692e9a103ed26156156bef5d2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ethernet/marvell/mvneta.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.4"},{"lessThan":"4.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","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":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.261","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"4.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mvneta: re-enable percpu interrupt on resume\n\nOn Marvell MPIC platforms (Armada 370/XP/38x), mvneta uses a percpu\nIRQ disable/enable scheme for NAPI: the ISR (mvneta_percpu_isr) calls\ndisable_percpu_irq() to mask the MPIC per-CPU interrupt and schedules\nNAPI poll, which calls enable_percpu_irq() on completion to unmask.\n\nIf suspend occurs while NAPI poll is pending (between\ndisable_percpu_irq in the ISR and enable_percpu_irq in poll\ncompletion), the interrupt is never re-enabled:\n\n  1. mvneta_percpu_isr: disable_percpu_irq() + napi_schedule()\n     => MPIC masked, percpu_enabled cpumask bit cleared\n  2. NAPI poll does not complete before suspend proceeds\n     (on PREEMPT_RT this is highly likely since softirqs run in\n     ksoftirqd which gets frozen; on non-RT it can happen when\n     softirq processing is deferred to ksoftirqd)\n  3. mvneta_stop_dev => napi_disable(): cancels the pending poll\n     without executing the completion path\n  4. suspend_device_irqs => IRQCHIP_MASK_ON_SUSPEND: masks MPIC\n     (already masked, but records IRQS_SUSPENDED)\n  5. Resume: mpic_resume checks irq_percpu_is_enabled() => false\n     (bit was cleared in step 1) => skips unmask\n  6. mvneta_start_dev only restores device-level INTR_NEW_MASK,\n     does not touch the MPIC per-CPU mask\n\nResult: MPIC per-CPU interrupt stays masked permanently. The NIC\ngenerates interrupts (INTR_NEW_CAUSE != 0) but the CPU never\nreceives them, causing complete loss of network connectivity.\n\nFix by calling on_each_cpu(mvneta_percpu_enable) in the resume path\nto unconditionally unmask the MPIC per-CPU interrupt regardless of\npre-suspend state."}],"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"},"scenarios":[{"lang":"en","value":"AV:N - Remote traffic on internet-facing Marvell Armada 370/XP/38x routers, NAS, and gateways drives mvneta_percpu_isr/NAPI (race step 1); the highest-impact scenario pairs sustained RX/TX load with automatic suspend/resume, so the attack is initiated from the network.\nAC:L - On PREEMPT_RT (called highly likely in the fix) or when softirq is deferred to ksoftirqd, an attacker can sustain traffic to keep NAPI pending across suspend; no uncontrollable memory layout or rare one-shot victim state is required beyond routine PM cycles.\nPR:N - Sending packets to the mvneta interface requires no credentials; in the strongest scenario suspend/resume is driven by automatic system power management rather than privileged manual action, so no account or capability on the victim is needed.\nUI:N - No victim user action is required beyond normal operation; remote traffic and automatic suspend/resume (or scheduled PM) suffice without anyone mounting devices or confirming prompts.\nS:U - The bug leaves the MPIC per-CPU IRQ permanently masked on the same host kernel/driver boundary; it does not cross VM, container, or IOMMU security domains.\nC:N - This is a driver/IRQ state-management logic error with no out-of-bounds access, use-after-free, or memory disclosure; interrupts stay masked but no kernel memory is read.\nI:N - No data structures or packets are corrupted; the failure mode is a permanently masked interrupt with no write primitive or control-flow hijack potential.\nA:H - After resume the MPIC per-CPU interrupt remains permanently masked, so the NIC never delivers packets despite hardware activity, causing complete and lasting loss of network connectivity until reboot."}]}],"providerMetadata":{"dateUpdated":"2026-08-17T05:43:49.648Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/bf88cd3b649bc3e638f1e8a77649581852747a68"},{"url":"https://git.kernel.org/stable/c/8c7a489aa71d2693752b2e794a68bf672d16c829"},{"url":"https://git.kernel.org/stable/c/82c13027ed283b856017adee970dbfdffce5c6b8"},{"url":"https://git.kernel.org/stable/c/be626ac1faadd49c2cead9f9cd06ba8752d81563"},{"url":"https://git.kernel.org/stable/c/1cc312dc8bc78fa24c80d5bc193dbf5b57a99cc6"},{"url":"https://git.kernel.org/stable/c/b84dd48f9da1eb132bdc06a944423cd5a1641ef1"},{"url":"https://git.kernel.org/stable/c/5bdb33ff6e58bdc43632e98b30723eb65352d671"},{"url":"https://git.kernel.org/stable/c/fd398d6480987e4c84fff0aaab6b9d6642a93343"}],"title":"net: mvneta: re-enable percpu interrupt on resume","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72409","datePublished":"2026-08-15T05:56:32.152Z","dateReserved":"2026-08-09T03:40:39.926Z","dateUpdated":"2026-08-17T05:43:49.648Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:14","lastModifiedDate":"2026-08-17 06:19:07","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":"72409","Ordinal":"1","Title":"net: mvneta: re-enable percpu interrupt on resume","CVE":"CVE-2026-72409","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72409","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mvneta: re-enable percpu interrupt on resume\n\nOn Marvell MPIC platforms (Armada 370/XP/38x), mvneta uses a percpu\nIRQ disable/enable scheme for NAPI: the ISR (mvneta_percpu_isr) calls\ndisable_percpu_irq() to mask the MPIC per-CPU interrupt and schedules\nNAPI poll, which calls enable_percpu_irq() on completion to unmask.\n\nIf suspend occurs while NAPI poll is pending (between\ndisable_percpu_irq in the ISR and enable_percpu_irq in poll\ncompletion), the interrupt is never re-enabled:\n\n  1. mvneta_percpu_isr: disable_percpu_irq() + napi_schedule()\n     => MPIC masked, percpu_enabled cpumask bit cleared\n  2. NAPI poll does not complete before suspend proceeds\n     (on PREEMPT_RT this is highly likely since softirqs run in\n     ksoftirqd which gets frozen; on non-RT it can happen when\n     softirq processing is deferred to ksoftirqd)\n  3. mvneta_stop_dev => napi_disable(): cancels the pending poll\n     without executing the completion path\n  4. suspend_device_irqs => IRQCHIP_MASK_ON_SUSPEND: masks MPIC\n     (already masked, but records IRQS_SUSPENDED)\n  5. Resume: mpic_resume checks irq_percpu_is_enabled() => false\n     (bit was cleared in step 1) => skips unmask\n  6. mvneta_start_dev only restores device-level INTR_NEW_MASK,\n     does not touch the MPIC per-CPU mask\n\nResult: MPIC per-CPU interrupt stays masked permanently. The NIC\ngenerates interrupts (INTR_NEW_CAUSE != 0) but the CPU never\nreceives them, causing complete loss of network connectivity.\n\nFix by calling on_each_cpu(mvneta_percpu_enable) in the resume path\nto unconditionally unmask the MPIC per-CPU interrupt regardless of\npre-suspend state.","Type":"Description","Title":"net: mvneta: re-enable percpu interrupt on resume"}]}}}