{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "812ce2f8d14ea791edd88c36ebcc9017bf4c88cb"
            },
            {
              "fixed": "33bba331a4a5fee8b6026fe72eca13cceeec1b7b"
            },
            {
              "fixed": "aff271b12a1eb8c8b3da19223ae1a6abe1e8168b"
            },
            {
              "fixed": "1dba8444ac0100133d72374634f6d7451fff1ccc"
            },
            {
              "fixed": "174a97f21bf9c54fa37ec0f321692e862ea130a3"
            },
            {
              "fixed": "f71e8d9875069fa73e335f63f02ec6e52e3aaa51"
            },
            {
              "fixed": "6350df503897d57c5634f71b0767d48c3b837583"
            },
            {
              "fixed": "4dcddc1c794d1c65eda68f1f8dd04a0fecc0870f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.12.0"
            },
            {
              "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": "6.12.96"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.39"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64430.json"
  },
  "details": "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.",
  "id": "CVE-2026-64430",
  "modified": "2026-09-05T03:31:02.106839674Z",
  "published": "2026-07-25T08:51:06.612Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/174a97f21bf9c54fa37ec0f321692e862ea130a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1dba8444ac0100133d72374634f6d7451fff1ccc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/33bba331a4a5fee8b6026fe72eca13cceeec1b7b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4dcddc1c794d1c65eda68f1f8dd04a0fecc0870f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6350df503897d57c5634f71b0767d48c3b837583"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aff271b12a1eb8c8b3da19223ae1a6abe1e8168b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f71e8d9875069fa73e335f63f02ec6e52e3aaa51"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64430.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64430"
    },
    {
      "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": "NTB: epf: Avoid calling pci_irq_vector() from hardirq context"
}