{
  "threat_severity" : "Moderate",
  "public_date" : "2026-06-24T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: dm log: fix out-of-bounds write due to region_count overflow",
    "id" : "2492277",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2492277"
  },
  "cvss3" : {
    "cvss3_base_score" : "6.3",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-190",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\ndm log: fix out-of-bounds write due to region_count overflow\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->len 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.\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.\nThis can be reproduced by creating a mirror target whose region_count\noverflows 32 bits:\ndmsetup create bigzero --table '0 8589934594 zero'\ndmsetup create mymirror --table '0 8589934594 mirror \\\ncore 2 2 nosync 2 /dev/mapper/bigzero 0 \\\n/dev/mapper/bigzero 0'\nThe status output confirms the truncation (sync_count=1 instead of\n4294967297, because 0x100000001 was truncated to 1):\n$ dmsetup status mymirror\n0 8589934594 mirror 2 254:1 254:1 1/4294967297 ...\nThis leads to a kernel crash in core_in_sync:\nBUG: scheduling while atomic: (udev-worker)/9150/0x00000000\nRIP: 0010:core_in_sync+0x14/0x30 [dm_log]\nCR2: 0000000000000008\nFixing recursive fault but reboot is needed!\nFix by widening the local region_count to sector_t and adding an\nexplicit overflow check before the value is assigned to lc->region_count.", "A flaw was found in the Linux kernel's device-mapper log (dm log) component. A local attacker could exploit an integer overflow vulnerability where a 64-bit value is truncated to 32 bits, leading to undersized memory allocations. This allows for out-of-bounds writes to kernel memory during log operations. Successful exploitation of this flaw can cause a kernel crash, resulting in a Denial of Service (DoS) for the affected system." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-07-24T00:00:00Z",
    "advisory" : "RHSA-2026:45114",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "kernel-0:6.12.0-211.39.1.el10_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10.0 Extended Update Support",
    "release_date" : "2026-08-17T00:00:00Z",
    "advisory" : "RHSA-2026:55445",
    "cpe" : "cpe:/o:redhat:enterprise_linux_eus:10.0",
    "package" : "kernel-0:6.12.0-55.98.1.el10_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7 Extended Lifecycle Support",
    "release_date" : "2026-09-03T00:00:00Z",
    "advisory" : "RHSA-2026:63189",
    "cpe" : "cpe:/a:redhat:rhel_extras_rt_els:7",
    "package" : "kernel-rt-0:3.10.0-1160.159.1.rt56.1311.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7 Extended Lifecycle Support",
    "release_date" : "2026-08-31T00:00:00Z",
    "advisory" : "RHSA-2026:61692",
    "cpe" : "cpe:/o:redhat:rhel_els:7",
    "package" : "kernel-0:3.10.0-1160.159.1.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-07-24T00:00:00Z",
    "advisory" : "RHSA-2026:45116",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.147.1.rt7.488.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-07-24T00:00:00Z",
    "advisory" : "RHSA-2026:45115",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.147.1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
    "release_date" : "2026-07-28T00:00:00Z",
    "advisory" : "RHSA-2026:47248",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.4",
    "package" : "kernel-0:4.18.0-305.200.1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
    "release_date" : "2026-07-28T00:00:00Z",
    "advisory" : "RHSA-2026:47248",
    "cpe" : "cpe:/o:redhat:rhel_eus_long_life:8.4",
    "package" : "kernel-0:4.18.0-305.200.1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
    "release_date" : "2026-08-12T00:00:00Z",
    "advisory" : "RHSA-2026:53989",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.6",
    "package" : "kernel-0:4.18.0-372.206.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
    "release_date" : "2026-08-12T00:00:00Z",
    "advisory" : "RHSA-2026:53989",
    "cpe" : "cpe:/o:redhat:rhel_eus_long_life:8.6",
    "package" : "kernel-0:4.18.0-372.206.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
    "release_date" : "2026-08-10T00:00:00Z",
    "advisory" : "RHSA-2026:52649",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.8",
    "package" : "kernel-0:4.18.0-477.158.1.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
    "release_date" : "2026-08-10T00:00:00Z",
    "advisory" : "RHSA-2026:52649",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.8",
    "package" : "kernel-0:4.18.0-477.158.1.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-07-24T00:00:00Z",
    "advisory" : "RHSA-2026:45192",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-687.30.1.el9_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-07-24T00:00:00Z",
    "advisory" : "RHSA-2026:45192",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-687.30.1.el9_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
    "release_date" : "2026-08-26T00:00:00Z",
    "advisory" : "RHSA-2026:59662",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.2",
    "package" : "kernel-0:5.14.0-284.188.1.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
    "release_date" : "2026-08-26T00:00:00Z",
    "advisory" : "RHSA-2026:59663",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.2::nfv",
    "package" : "kernel-rt-0:5.14.0-284.188.1.rt14.473.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.6 Extended Update Support",
    "release_date" : "2026-08-19T00:00:00Z",
    "advisory" : "RHSA-2026:56574",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.6",
    "package" : "kernel-0:5.14.0-570.135.1.el9_6"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Under investigation",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-53059\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53059\nhttps://lore.kernel.org/linux-cve-announce/2026062401-CVE-2026-53059-f32e@gregkh/T" ],
  "name" : "CVE-2026-53059",
  "csaw" : false
}