CVE-2026-53059 (GCVE-0-2026-53059)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-07-29 12:04
VLAI
Title
dm log: fix out-of-bounds write due to region_count overflow
Summary
In the Linux kernel, the following vulnerability has been resolved: dm log: fix out-of-bounds write due to region_count overflow The local variable region_count in create_log_context() is declared as unsigned int (32-bit), but dm_sector_div_up() returns sector_t (64-bit). When a device-mapper target has a sufficiently large ti->len with a small region_size, the division result can exceed UINT_MAX. The truncated value is then used to calculate bitset_size, causing clean_bits, sync_bits, and recovering_bits to be allocated far smaller than needed for the actual number of regions. Subsequent log operations (log_set_bit, log_clear_bit, log_test_bit) use region indices derived from the full untruncated region space, causing out-of-bounds writes to kernel heap memory allocated by vmalloc. This can be reproduced by creating a mirror target whose region_count overflows 32 bits: dmsetup create bigzero --table '0 8589934594 zero' dmsetup create mymirror --table '0 8589934594 mirror \ core 2 2 nosync 2 /dev/mapper/bigzero 0 \ /dev/mapper/bigzero 0' The status output confirms the truncation (sync_count=1 instead of 4294967297, because 0x100000001 was truncated to 1): $ dmsetup status mymirror 0 8589934594 mirror 2 254:1 254:1 1/4294967297 ... This leads to a kernel crash in core_in_sync: BUG: scheduling while atomic: (udev-worker)/9150/0x00000000 RIP: 0010:core_in_sync+0x14/0x30 [dm_log] CR2: 0000000000000008 Fixing recursive fault but reboot is needed! Fix by widening the local region_count to sector_t and adding an explicit overflow check before the value is assigned to lc->region_count.
Severity
6.3 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE
  • CWE-190 - Integer Overflow or Wraparound
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 44ab8875ae4a2842bde2d756bed195d375e0debb (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < defe483e47173768c227532694dc78cb65db5f09 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3ec74da927b4e171a6fc0e77b1188ba4d019af51 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d4ac87567f86a55c3c92e9a5144dcd943a9772a1 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 12bd5b88e91a02785244ff1d20fb157e96e9cdc8 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b455903eed4558982be0811f5b7f44f6bbc4ff57 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4ec8323b9f0764a14d532b1ae9b87f8a9fecb867 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c20e36b7631d83e7535877f08af8b0af72c44b1a (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:6.12.0-211.39.1.el10_2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:4.18.0-553.147.1.rt7.488.el8_10 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::nfv
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:4.18.0-553.147.1.el8_10 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 0:4.18.0-305.200.1.el8_4 , < * (rpm)
    cpe:/o:redhat:rhel_aus:8.4
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Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 0:4.18.0-305.200.1.el8_4 , < * (rpm)
    cpe:/o:redhat:rhel_eus_long_life:8.4
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:5.14.0-687.30.1.el9_8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9
    cpe:/o:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
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Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
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        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/44ab8875ae4a2842bde2d756bed195d375e0debb"
        },
        {
          "url": "https://git.kernel.org/stable/c/defe483e47173768c227532694dc78cb65db5f09"
        },
        {
          "url": "https://git.kernel.org/stable/c/3ec74da927b4e171a6fc0e77b1188ba4d019af51"
        },
        {
          "url": "https://git.kernel.org/stable/c/d4ac87567f86a55c3c92e9a5144dcd943a9772a1"
        },
        {
          "url": "https://git.kernel.org/stable/c/12bd5b88e91a02785244ff1d20fb157e96e9cdc8"
        },
        {
          "url": "https://git.kernel.org/stable/c/b455903eed4558982be0811f5b7f44f6bbc4ff57"
        },
        {
          "url": "https://git.kernel.org/stable/c/4ec8323b9f0764a14d532b1ae9b87f8a9fecb867"
        },
        {
          "url": "https://git.kernel.org/stable/c/c20e36b7631d83e7535877f08af8b0af72c44b1a"
        }
      ],
      "title": "dm log: fix out-of-bounds write due to region_count overflow",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53059",
    "datePublished": "2026-06-24T16:30:04.210Z",
    "dateReserved": "2026-06-09T07:44:35.382Z",
    "dateUpdated": "2026-07-29T12:04:49.907Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-53059",
      "date": "2026-08-06",
      "epss": "0.0014",
      "percentile": "0.03831"
    },
    "microsoft_vex": {
      "current_release_date": "2026-07-09T14:44:05.000Z",
      "cve": "CVE-2026-53059",
      "id": "msrc_CVE-2026-53059",
      "initial_release_date": "2026-06-02T00:00:00.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "dm log: fix out-of-bounds write due to region_count overflow",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53059.json",
      "version": "2"
    },
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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 \u00270 8589934594 zero\u0027\\n  dmsetup create mymirror --table \u00270 8589934594 mirror \\\\\\n    core 2 2 nosync 2 /dev/mapper/bigzero 0 \\\\\\n    /dev/mapper/bigzero 0\u0027\\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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/md/dm-log.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"44ab8875ae4a2842bde2d756bed195d375e0debb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"defe483e47173768c227532694dc78cb65db5f09\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"3ec74da927b4e171a6fc0e77b1188ba4d019af51\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"d4ac87567f86a55c3c92e9a5144dcd943a9772a1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"12bd5b88e91a02785244ff1d20fb157e96e9cdc8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"b455903eed4558982be0811f5b7f44f6bbc4ff57\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"4ec8323b9f0764a14d532b1ae9b87f8a9fecb867\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"c20e36b7631d83e7535877f08af8b0af72c44b1a\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/md/dm-log.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.258\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.141\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.91\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.33\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.10\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"affectedData\":[{\"vendor\":\"Red 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Party Advisory\"]},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2492277\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53059.json\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-28T22:45:16+00:00",
      "cve": "CVE-2026-53059",
      "id": "CVE-2026-53059",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:fixed": "812",
      "product_status:known_affected": "50",
      "product_status:under_investigation": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: dm log: fix out-of-bounds write due to region_count overflow",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53059.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-30T16:41:38Z",
      "cve": "CVE-2026-53059",
      "id": "CVE-2026-53059",
      "initial_release_date": "2026-07-01T03:19:27Z",
      "product_status:known_affected": "295",
      "product_status:recommended": "103",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53059",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53059.json",
      "version": "7"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.