xsk: fix an integer overflow in xp_create_and_assign_umem()

{
  "id": "a528836a4c2fbc670014170d5c59700fa122f8af3223dbb44c51e408aeed00e3",
  "url": "https://osv.dev/vulnerability/CVE-2025-21997",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "xsk: fix an integer overflow in xp_create_and_assign_umem()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: xsk: fix an integer overflow in xp_create_and_assign_umem() Since the i and pool->chunk_size variables are of type 'u32', their product can wrap around and then be cast to 'u64'. This can lead to two different XDP buffers pointing to the same memory area. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with SVACE.",
    "evidence": "osv:CVE-2025-21997",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.132",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.85",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.21",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-21997",
      "aliases": [
        "CVE-2025-21997"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "94033cd8e73b8632bab7c8b7bb54caa4f5616db7"
                },
                {
                  "fixed": "205649d642a5b376724f04f3a5b3586815e43d3b"
                },
                {
                  "fixed": "b7b4be1fa43294b50b22e812715198629806678a"
                },
                {
                  "fixed": "130290f44bce0eead2b827302109afc3fe189ddd"
                },
                {
                  "fixed": "c7670c197b0f1a8726ad5c87bc2bf001a1fc1bbd"
                },
                {
                  "fixed": "559847f56769037e5b2e0474d3dbff985b98083d"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21997.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.132"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.85"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.21"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.13.9"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21997.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:44.692297076Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/130290f44bce0eead2b827302109afc3fe189ddd",
        "https://git.kernel.org/stable/c/205649d642a5b376724f04f3a5b3586815e43d3b",
        "https://git.kernel.org/stable/c/559847f56769037e5b2e0474d3dbff985b98083d",
        "https://git.kernel.org/stable/c/b7b4be1fa43294b50b22e812715198629806678a",
        "https://git.kernel.org/stable/c/c7670c197b0f1a8726ad5c87bc2bf001a1fc1bbd",
        "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21997.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-21997",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21997.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-21997",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 512650,
  "published_at": "2025-04-03T07:19:00.583+00:00"
}