{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4"
            },
            {
              "fixed": "eb47b9bffd07a47b84910847cb5ea066ce184055"
            },
            {
              "fixed": "06f6dd2ff2bd07eaf7178a807407ff27e85122b4"
            },
            {
              "fixed": "a4be4a1308f02bff79a30eea2d04ead5b63685f2"
            },
            {
              "fixed": "81371dbd23601f67f01372817fdbab42c5601e43"
            },
            {
              "fixed": "9764a786ba98db58f0725913c369e721253aba33"
            },
            {
              "fixed": "d876153680e3d721d385e554def919bce3d18c74"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.1.177"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.144"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.95"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.38"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64254.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nNTB: epf: Avoid pci_iounmap() with offset when PEER_SPAD and CONFIG share BAR\n\nWhen BAR_PEER_SPAD and BAR_CONFIG share one PCI BAR, the module teardown\npath ends up calling pci_iounmap() on the same iomem with some offset,\nwhich is unnecessary and triggers a kernel warning like the following:\n\n  Trying to vunmap() nonexistent vm area (0000000069a5ffe8)\n  WARNING: mm/vmalloc.c:3470 at vunmap+0x58/0x68, CPU#5: modprobe/2937\n  [...]\n  Call trace:\n   vunmap+0x58/0x68 (P)\n   iounmap+0x34/0x48\n   pci_iounmap+0x2c/0x40\n   ntb_epf_pci_remove+0x44/0x80 [ntb_hw_epf]\n   pci_device_remove+0x48/0xf8\n   device_remove+0x50/0x88\n   device_release_driver_internal+0x1c8/0x228\n   driver_detach+0x50/0xb0\n   bus_remove_driver+0x74/0x100\n   driver_unregister+0x34/0x68\n   pci_unregister_driver+0x34/0xa0\n   ntb_epf_pci_driver_exit+0x14/0xfe0 [ntb_hw_epf]\n  [...]\n\nFix it by unmapping only when PEER_SPAD and CONFIG use difference bars.",
  "id": "CVE-2026-64254",
  "modified": "2026-08-18T03:31:26.282208987Z",
  "published": "2026-07-24T15:31:22.293Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/06f6dd2ff2bd07eaf7178a807407ff27e85122b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/81371dbd23601f67f01372817fdbab42c5601e43"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9764a786ba98db58f0725913c369e721253aba33"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a4be4a1308f02bff79a30eea2d04ead5b63685f2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d876153680e3d721d385e554def919bce3d18c74"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb47b9bffd07a47b84910847cb5ea066ce184055"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64254.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64254"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "NTB: epf: Avoid pci_iounmap() with offset when PEER_SPAD and CONFIG share BAR"
}