{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b29d4986d0da1a27cd35917cdb433672f5c95d7f"
            },
            {
              "fixed": "01264a6a3a3ad7ac1d73443299cd5a9568002454"
            },
            {
              "fixed": "ee38fb00e1a80f46a4990e38f25ecb04ae7b7417"
            },
            {
              "fixed": "c7fb6bc864c4910b344dafa36dd5028e9b980768"
            },
            {
              "fixed": "0aa745fea1f8dc81bcdd0a45e215b6706727b482"
            },
            {
              "fixed": "a2635d541a93fd111e743cf14b6275dc81be2abc"
            },
            {
              "fixed": "25dcc1989c194ba2b5fb6d03cbb9b83814ac0d15"
            },
            {
              "fixed": "df3b8ef06cc62de4fca5d2108e285085b3cffd44"
            },
            {
              "fixed": "7d1f98d668ee34c1d15bdc0420fdd062f24a27c0"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.12.0"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.141"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.91"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.33"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53064.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm cache: fix null-deref with concurrent writes in passthrough mode\n\nIn passthrough mode, when dm-cache starts to invalidate a cache\nentry and bio prison cell lock fails due to concurrent write to\nthe same cached block, mg-\u003ecell remains NULL. The error path in\ninvalidate_complete() attempts to unlock and free the cell\nunconditionally, causing a NULL pointer dereference:\n\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 0 UID: 0 PID: 134 Comm: fio Not tainted 6.19.0-rc7 #3 PREEMPT\nRIP: 0010:dm_cell_unlock_v2+0x3f/0x210\n\u003csnip\u003e\nCall Trace:\n invalidate_complete+0xef/0x430\n map_bio+0x130f/0x1a10\n cache_map+0x320/0x6b0\n __map_bio+0x458/0x510\n dm_submit_bio+0x40e/0x16d0\n __submit_bio+0x419/0x870\n\u003csnip\u003e\n\nReproduce steps:\n\n1. Create a cache device\n\ndmsetup create cmeta --table \"0 8192 linear /dev/sdc 0\"\ndmsetup create cdata --table \"0 131072 linear /dev/sdc 8192\"\ndmsetup create corig --table \"0 262144 linear /dev/sdc 262144\"\ndd if=/dev/zero of=/dev/mapper/cmeta bs=4k count=1 oflag=direct\ndmsetup create cache --table \"0 262144 cache /dev/mapper/cmeta \\\n/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0\"\n\n2. Promote the first data block into cache\n\nfio --filename=/dev/mapper/cache --name=populate --rw=write --bs=4k \\\n--direct=1 --size=64k\n\n3. Reload the cache into passthrough mode\n\ndmsetup suspend cache\ndmsetup reload cache --table \"0 262144 cache /dev/mapper/cmeta \\\n/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 passthrough smq 0\"\ndmsetup resume cache\n\n4. Write to the first cached block concurrently\n\nfio --filename=/dev/mapper/cache --name test --rw=randwrite --bs=4k \\\n--randrepeat=0 --direct=1 --numjobs=2 --size 64k\n\nFix by checking if mg-\u003ecell is valid before attempting to unlock it.",
  "id": "CVE-2026-53064",
  "modified": "2026-07-16T03:31:07.921796464Z",
  "published": "2026-06-24T16:30:07.536Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/01264a6a3a3ad7ac1d73443299cd5a9568002454"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0aa745fea1f8dc81bcdd0a45e215b6706727b482"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/25dcc1989c194ba2b5fb6d03cbb9b83814ac0d15"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7d1f98d668ee34c1d15bdc0420fdd062f24a27c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a2635d541a93fd111e743cf14b6275dc81be2abc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7fb6bc864c4910b344dafa36dd5028e9b980768"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df3b8ef06cc62de4fca5d2108e285085b3cffd44"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee38fb00e1a80f46a4990e38f25ecb04ae7b7417"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53064.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53064"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "dm cache: fix null-deref with concurrent writes in passthrough mode"
}