{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "44ab8875ae4a2842bde2d756bed195d375e0debb"
            },
            {
              "fixed": "defe483e47173768c227532694dc78cb65db5f09"
            },
            {
              "fixed": "3ec74da927b4e171a6fc0e77b1188ba4d019af51"
            },
            {
              "fixed": "d4ac87567f86a55c3c92e9a5144dcd943a9772a1"
            },
            {
              "fixed": "12bd5b88e91a02785244ff1d20fb157e96e9cdc8"
            },
            {
              "fixed": "b455903eed4558982be0811f5b7f44f6bbc4ff57"
            },
            {
              "fixed": "4ec8323b9f0764a14d532b1ae9b87f8a9fecb867"
            },
            {
              "fixed": "c20e36b7631d83e7535877f08af8b0af72c44b1a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.12"
            },
            {
              "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-2026-53059.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm log: fix out-of-bounds write due to region_count overflow\n\nThe local variable region_count in create_log_context() is declared as\nunsigned int (32-bit), but dm_sector_div_up() returns sector_t (64-bit).\nWhen a device-mapper target has a sufficiently large ti-\u003elen with a small\nregion_size, the division result can exceed UINT_MAX. The truncated\nvalue is then used to calculate bitset_size, causing clean_bits,\nsync_bits, and recovering_bits to be allocated far smaller than needed\nfor the actual number of regions.\n\nSubsequent log operations (log_set_bit, log_clear_bit, log_test_bit) use\nregion indices derived from the full untruncated region space, causing\nout-of-bounds writes to kernel heap memory allocated by vmalloc.\n\nThis can be reproduced by creating a mirror target whose region_count\noverflows 32 bits:\n\n  dmsetup create bigzero --table '0 8589934594 zero'\n  dmsetup create mymirror --table '0 8589934594 mirror \\\n    core 2 2 nosync 2 /dev/mapper/bigzero 0 \\\n    /dev/mapper/bigzero 0'\n\nThe status output confirms the truncation (sync_count=1 instead of\n4294967297, because 0x100000001 was truncated to 1):\n\n  $ dmsetup status mymirror\n  0 8589934594 mirror 2 254:1 254:1 1/4294967297 ...\n\nThis leads to a kernel crash in core_in_sync:\n\n  BUG: scheduling while atomic: (udev-worker)/9150/0x00000000\n  RIP: 0010:core_in_sync+0x14/0x30 [dm_log]\n  CR2: 0000000000000008\n  Fixing recursive fault but reboot is needed!\n\nFix by widening the local region_count to sector_t and adding an\nexplicit overflow check before the value is assigned to lc-\u003eregion_count.",
  "id": "CVE-2026-53059",
  "modified": "2026-07-16T03:31:13.870292010Z",
  "published": "2026-06-24T16:30:04.210Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/12bd5b88e91a02785244ff1d20fb157e96e9cdc8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ec74da927b4e171a6fc0e77b1188ba4d019af51"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/44ab8875ae4a2842bde2d756bed195d375e0debb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ec8323b9f0764a14d532b1ae9b87f8a9fecb867"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b455903eed4558982be0811f5b7f44f6bbc4ff57"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c20e36b7631d83e7535877f08af8b0af72c44b1a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d4ac87567f86a55c3c92e9a5144dcd943a9772a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/defe483e47173768c227532694dc78cb65db5f09"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53059.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/security/cve/CVE-2026-53059"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53059.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53059"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492277"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "dm log: fix out-of-bounds write due to region_count overflow"
}