{
  "threat_severity" : "Moderate",
  "public_date" : "2025-02-27T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: mm/compaction: fix UBSAN shift-out-of-bounds warning",
    "id" : "2348902",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2348902"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.1",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/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:\nmm/compaction: fix UBSAN shift-out-of-bounds warning\nsyzkaller reported a UBSAN shift-out-of-bounds warning of (1UL << order)\nin isolate_freepages_block().  The bogus compound_order can be any value\nbecause it is union with flags.  Add back the MAX_PAGE_ORDER check to fix\nthe warning.", "A flaw was found in the memory management subsystem in the Linux kernel. An integer overflow in a shift operation can cause unexpected behavior in memory management, resulting in system instability and a denial of service." ],
  "statement" : "The Linux kernel as shipped in Red Hat Enterprise Linux 6, 7, 8 and 9 is not affected by this vulnerability because the vulnerable code was introduced in a newer version of the Linux kernel.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10.0 Extended Update Support",
    "release_date" : "2026-01-26T00:00:00Z",
    "advisory" : "RHSA-2026:1236",
    "cpe" : "cpe:/o:redhat:enterprise_linux_eus:10.0",
    "package" : "kernel-0:6.12.0-55.55.1.el10_0"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2025-21815\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-21815\nhttps://lore.kernel.org/linux-cve-announce/2025022709-CVE-2025-21815-19c9@gregkh/T" ],
  "name" : "CVE-2025-21815",
  "csaw" : false
}