{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b7e2823787735ca009e63f35f164b46df0ef096c"
            },
            {
              "fixed": "eb9aa9f8010465d927864f5a35bdc5604b0ff51a"
            },
            {
              "fixed": "9b69243983fb2f4d4d1f4ef0989bc1296547dc2c"
            },
            {
              "fixed": "cb500023a75246f60b79af9f7321d6e75330c5b5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.15.0"
            },
            {
              "fixed": "6.18.14"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46268.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/P2PDMA: Fix p2pmem_alloc_mmap() warning condition\n\nCommit b7e282378773 has already changed the initial page refcount of\np2pdma page from one to zero, however, in p2pmem_alloc_mmap() it uses\n\"VM_WARN_ON_ONCE_PAGE(!page_ref_count(page))\" to assert the initial page\nrefcount should not be zero and the following will be reported when\nCONFIG_DEBUG_VM is enabled:\n\n  page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x380400000\n  flags: 0x20000000002000(reserved|node=0|zone=4)\n  raw: 0020000000002000 ff1100015e3ab440 0000000000000000 0000000000000000\n  raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000\n  page dumped because: VM_WARN_ON_ONCE_PAGE(!page_ref_count(page))\n  ------------[ cut here ]------------\n  WARNING: CPU: 5 PID: 449 at drivers/pci/p2pdma.c:240 p2pmem_alloc_mmap+0x83a/0xa60\n\nFix by using \"page_ref_count(page)\" as the assertion condition.",
  "id": "CVE-2026-46268",
  "modified": "2026-08-12T03:51:24.911113607Z",
  "published": "2026-06-03T15:50:10.101Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b69243983fb2f4d4d1f4ef0989bc1296547dc2c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cb500023a75246f60b79af9f7321d6e75330c5b5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb9aa9f8010465d927864f5a35bdc5604b0ff51a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46268.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46268"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "PCI/P2PDMA: Fix p2pmem_alloc_mmap() warning condition"
}