memblock: Accept allocated memory before use in memblock_double_array()

{
  "id": "7a906deb32e24faab3a1488008c4bce449c31e0f09855d9d37a4f1abe7581c6f",
  "url": "https://osv.dev/vulnerability/CVE-2025-37960",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "memblock: Accept allocated memory before use in memblock_double_array()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: memblock: Accept allocated memory before use in memblock_double_array() When increasing the array size in memblock_double_array() and the slab is not yet available, a call to memblock_find_in_range() is used to reserve/allocate memory. However, the range returned may not have been accepted, which can result in a crash when booting an SNP guest: RIP: 0010:memcpy_orig+0x68/0x130 Code: ... RSP: 0000:ffffffff9cc03ce8 EFLAGS: 00010006 RAX: ff11001ff83e5000 RBX: 0000000000000000 RCX: fffffffffffff000 RDX: 0000000000000bc0 RSI: ffffffff9dba8860 RDI: ff11001ff83e5c00 RBP: 0000000000002000 R08: 0000000000000000 R09: 0000000000002000 R10: 000000207fffe000 R11: 0000040000000000 R12: ffffffff9d06ef78 R13: ff11001ff83e5000 R14: ffffffff9dba7c60 R15: 0000000000000c00 memblock_double_array+0xff/0x310 memblock_add_range+0x1fb/0x2f0 memblock_reserve+0x4f/0xa0 memblock_alloc_range_nid+0xac/0x130 memblock_alloc_internal+0x53/0xc0 memblock_alloc_try_nid+0x3d/0xa0 swiotlb_init_remap+0x149/0x2f0 mem_init+0xb/0xb0 mm_core_init+0x8f/0x350 start_kernel+0x17e/0x5d0 x86_64_start_reservations+0x14/0x30 x86_64_start_kernel+0x92/0xa0 secondary_startup_64_no_verify+0x194/0x19b Mitigate this by calling accept_memory() on the memory range returned before the slab is available. Prior to v6.12, the accept_memory() interface used a 'start' and 'end' parameter instead of 'start' and 'size', therefore the accept_memory() call must be adjusted to ",
    "evidence": "osv:CVE-2025-37960",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.92",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.29",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.14.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-37960",
      "aliases": [
        "CVE-2025-37960"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6"
                },
                {
                  "fixed": "7bcd29181bab8d508d2adfdbb132de8b1e088698"
                },
                {
                  "fixed": "d66a22f6a432a9dd376c9b365d7dc89bd416909c"
                },
                {
                  "fixed": "aa513e69e011a2b19fa22ce62ce35effbd5e0c81"
                },
                {
                  "fixed": "da8bf5daa5e55a6af2b285ecda460d6454712ff4"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37960.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.5.0"
                },
                {
                  "fixed": "6.6.92"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.29"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.14.7"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37960.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:44.700377295Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/7bcd29181bab8d508d2adfdbb132de8b1e088698",
        "https://git.kernel.org/stable/c/aa513e69e011a2b19fa22ce62ce35effbd5e0c81",
        "https://git.kernel.org/stable/c/d66a22f6a432a9dd376c9b365d7dc89bd416909c",
        "https://git.kernel.org/stable/c/da8bf5daa5e55a6af2b285ecda460d6454712ff4",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37960.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-37960",
        "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/2025/37xxx/CVE-2025-37960.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-37960",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 512579,
  "published_at": "2025-05-20T16:01:53.264+00:00"
}