{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "492c5d455969fc2e829f26ed4c83487b068f0dd7"
            },
            {
              "fixed": "77c059f41e9395793917d067476f549a911d77d3"
            },
            {
              "fixed": "76410790f1491c8e06a451045ae223a61c652455"
            },
            {
              "fixed": "8fa244738641d95ea4d70e6f9a62778bba42a5b7"
            },
            {
              "fixed": "8582792cf23b3d94674d4d838f7cde9a28d0fcaf"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.8.0"
            },
            {
              "fixed": "6.12.92"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.34"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64052.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user()\n\npin_user_pages_fast() can partially succeed and return the number of\npages that were actually pinned. However, the bio_integrity_map_user()\ndoes not handle this partial pinning. This leads to a general protection\nfault since bvec_from_pages() dereferences an unpinned page address,\nwhich is 0.\n\nTo fix this, add a check to verify that all requested memory is pinned.\nIf partial pinning occurs, unpin the memory and return -EFAULT.\n\nKernel Oops:\n\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 0 UID: 0 PID: 1061 Comm: nvme-passthroug Not tainted 7.0.0-11783-g90957f9314e8-dirty #16 PREEMPT(lazy)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014\nRIP: 0010:bio_integrity_map_user.cold+0x1b0/0x9d6",
  "id": "CVE-2026-64052",
  "modified": "2026-07-21T03:41:55.064775696Z",
  "published": "2026-07-19T15:39:35.223Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76410790f1491c8e06a451045ae223a61c652455"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77c059f41e9395793917d067476f549a911d77d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8582792cf23b3d94674d4d838f7cde9a28d0fcaf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8fa244738641d95ea4d70e6f9a62778bba42a5b7"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64052.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64052"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "block: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user()"
}