{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "12bb03b436dad56692e9a103ed26156156bef5d2"
            },
            {
              "fixed": "bf88cd3b649bc3e638f1e8a77649581852747a68"
            },
            {
              "fixed": "8c7a489aa71d2693752b2e794a68bf672d16c829"
            },
            {
              "fixed": "82c13027ed283b856017adee970dbfdffce5c6b8"
            },
            {
              "fixed": "be626ac1faadd49c2cead9f9cd06ba8752d81563"
            },
            {
              "fixed": "1cc312dc8bc78fa24c80d5bc193dbf5b57a99cc6"
            },
            {
              "fixed": "b84dd48f9da1eb132bdc06a944423cd5a1641ef1"
            },
            {
              "fixed": "5bdb33ff6e58bdc43632e98b30723eb65352d671"
            },
            {
              "fixed": "fd398d6480987e4c84fff0aaab6b9d6642a93343"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.4.0"
            },
            {
              "fixed": "5.10.261"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.212"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72409.json"
  },
  "details": "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     =\u003e 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 =\u003e napi_disable(): cancels the pending poll\n     without executing the completion path\n  4. suspend_device_irqs =\u003e IRQCHIP_MASK_ON_SUSPEND: masks MPIC\n     (already masked, but records IRQS_SUSPENDED)\n  5. Resume: mpic_resume checks irq_percpu_is_enabled() =\u003e false\n     (bit was cleared in step 1) =\u003e 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.",
  "id": "CVE-2026-72409",
  "modified": "2026-08-18T03:31:18.070402986Z",
  "published": "2026-08-15T05:56:32.152Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1cc312dc8bc78fa24c80d5bc193dbf5b57a99cc6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5bdb33ff6e58bdc43632e98b30723eb65352d671"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/82c13027ed283b856017adee970dbfdffce5c6b8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c7a489aa71d2693752b2e794a68bf672d16c829"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b84dd48f9da1eb132bdc06a944423cd5a1641ef1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be626ac1faadd49c2cead9f9cd06ba8752d81563"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bf88cd3b649bc3e638f1e8a77649581852747a68"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd398d6480987e4c84fff0aaab6b9d6642a93343"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72409.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72409"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "net: mvneta: re-enable percpu interrupt on resume"
}