CVE-2025-21815 (GCVE-0-2025-21815)

Vulnerability from cvelistv5 – Published: 2025-02-27 20:04 – Updated: 2026-05-11 21:07
VLAI
Title
mm/compaction: fix UBSAN shift-out-of-bounds warning
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/compaction: fix UBSAN shift-out-of-bounds warning syzkaller reported a UBSAN shift-out-of-bounds warning of (1UL << order) in isolate_freepages_block(). The bogus compound_order can be any value because it is union with flags. Add back the MAX_PAGE_ORDER check to fix the warning.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3da0272a4c7d0d37b47b28e87014f421296fc2be , < 4491159774d973a9e2e998d25d8fbb20fada6dfa (git)
Affected: 3da0272a4c7d0d37b47b28e87014f421296fc2be , < 10b7d3eb535098ccd4c82a182a33655d8a0e5c88 (git)
Affected: 3da0272a4c7d0d37b47b28e87014f421296fc2be , < d1366e74342e75555af2648a2964deb2d5c92200 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.14 , ≤ 6.12.* (semver)
Unaffected: 6.13.3 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/compaction.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4491159774d973a9e2e998d25d8fbb20fada6dfa",
              "status": "affected",
              "version": "3da0272a4c7d0d37b47b28e87014f421296fc2be",
              "versionType": "git"
            },
            {
              "lessThan": "10b7d3eb535098ccd4c82a182a33655d8a0e5c88",
              "status": "affected",
              "version": "3da0272a4c7d0d37b47b28e87014f421296fc2be",
              "versionType": "git"
            },
            {
              "lessThan": "d1366e74342e75555af2648a2964deb2d5c92200",
              "status": "affected",
              "version": "3da0272a4c7d0d37b47b28e87014f421296fc2be",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "mm/compaction.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.14",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13.3",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/compaction: fix UBSAN shift-out-of-bounds warning\n\nsyzkaller reported a UBSAN shift-out-of-bounds warning of (1UL \u003c\u003c 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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:07:04.528Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4491159774d973a9e2e998d25d8fbb20fada6dfa"
        },
        {
          "url": "https://git.kernel.org/stable/c/10b7d3eb535098ccd4c82a182a33655d8a0e5c88"
        },
        {
          "url": "https://git.kernel.org/stable/c/d1366e74342e75555af2648a2964deb2d5c92200"
        }
      ],
      "title": "mm/compaction: fix UBSAN shift-out-of-bounds warning",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21815",
    "datePublished": "2025-02-27T20:04:14.733Z",
    "dateReserved": "2024-12-29T08:45:45.774Z",
    "dateUpdated": "2026-05-11T21:07:04.528Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-21815",
      "date": "2026-10-04",
      "epss": "0.00193",
      "percentile": "0.08087"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "mm/compaction.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "4491159774d973a9e2e998d25d8fbb20fada6dfa",
                    "status": "affected",
                    "version": "3da0272a4c7d0d37b47b28e87014f421296fc2be",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "10b7d3eb535098ccd4c82a182a33655d8a0e5c88",
                    "status": "affected",
                    "version": "3da0272a4c7d0d37b47b28e87014f421296fc2be",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "d1366e74342e75555af2648a2964deb2d5c92200",
                    "status": "affected",
                    "version": "3da0272a4c7d0d37b47b28e87014f421296fc2be",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "mm/compaction.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "6.7"
                  },
                  {
                    "lessThan": "6.7",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.14",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.13.*",
                    "status": "unaffected",
                    "version": "6.13.3",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.14",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "033BB7EE-C9A2-45EA-BAC9-87BB9D951BCD",
                    "versionEndExcluding": "6.12.14",
                    "versionStartIncluding": "6.7",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "0E92CEE3-1FC3-4AFC-A513-DEDBA7414F00",
                    "versionEndExcluding": "6.13.3",
                    "versionStartIncluding": "6.13",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/compaction: fix UBSAN shift-out-of-bounds warning\n\nsyzkaller reported a UBSAN shift-out-of-bounds warning of (1UL \u003c\u003c 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."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/compaction: se corrige la advertencia de cambio fuera de los l\u00edmites de UBSAN syzkaller inform\u00f3 una advertencia de cambio fuera de los l\u00edmites de UBSAN de (1UL \u0026lt;\u0026lt; order) en isolate_freepages_block(). El compuesto falso puede ser cualquier valor porque es una uni\u00f3n con indicadores. Vuelva a agregar la verificaci\u00f3n MAX_PAGE_ORDER para corregir la advertencia."
          }
        ],
        "id": "CVE-2025-21815",
        "lastModified": "2026-06-17T08:44:21.663",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.1,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.2,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-02-27T20:16:04.063",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/10b7d3eb535098ccd4c82a182a33655d8a0e5c88"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4491159774d973a9e2e998d25d8fbb20fada6dfa"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d1366e74342e75555af2648a2964deb2d5c92200"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-125"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T00:00:23+00:00",
      "cve": "CVE-2025-21815",
      "id": "CVE-2025-21815",
      "initial_release_date": "2025-02-27T00:00:00+00:00",
      "product_status:fixed": "307",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mm/compaction: fix UBSAN shift-out-of-bounds warning",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-21815.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-12T16:52:37Z",
      "cve": "CVE-2025-21815",
      "id": "CVE-2025-21815",
      "initial_release_date": "2025-03-01T02:52:23Z",
      "product_status:known_affected": "461",
      "product_status:known_not_affected": "343",
      "product_status:recommended": "357",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-21815",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-21815.json",
      "version": "47"
    }
  }
}



Log in or create an account to share your comment.




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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.