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CVE-2025-37960 (GCVE-0-2025-37960)

Vulnerability from cvelistv5 – Published: 2025-05-20 16:01 – Updated: 2026-05-11 21:18
VLAI
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 specify 'start + size' for 'end' when applying to kernels prior to v6.12.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6 , < 7bcd29181bab8d508d2adfdbb132de8b1e088698 (git)
Affected: dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6 , < d66a22f6a432a9dd376c9b365d7dc89bd416909c (git)
Affected: dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6 , < aa513e69e011a2b19fa22ce62ce35effbd5e0c81 (git)
Affected: dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6 , < da8bf5daa5e55a6af2b285ecda460d6454712ff4 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.5
Unaffected: 0 , < 6.5 (semver)
Unaffected: 6.6.92 , ≤ 6.6.* (semver)
Unaffected: 6.12.29 , ≤ 6.12.* (semver)
Unaffected: 6.14.7 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmemblock: Accept allocated memory before use in memblock_double_array()\n\nWhen increasing the array size in memblock_double_array() and the slab\nis not yet available, a call to memblock_find_in_range() is used to\nreserve/allocate memory. However, the range returned may not have been\naccepted, which can result in a crash when booting an SNP guest:\n\n  RIP: 0010:memcpy_orig+0x68/0x130\n  Code: ...\n  RSP: 0000:ffffffff9cc03ce8 EFLAGS: 00010006\n  RAX: ff11001ff83e5000 RBX: 0000000000000000 RCX: fffffffffffff000\n  RDX: 0000000000000bc0 RSI: ffffffff9dba8860 RDI: ff11001ff83e5c00\n  RBP: 0000000000002000 R08: 0000000000000000 R09: 0000000000002000\n  R10: 000000207fffe000 R11: 0000040000000000 R12: ffffffff9d06ef78\n  R13: ff11001ff83e5000 R14: ffffffff9dba7c60 R15: 0000000000000c00\n  memblock_double_array+0xff/0x310\n  memblock_add_range+0x1fb/0x2f0\n  memblock_reserve+0x4f/0xa0\n  memblock_alloc_range_nid+0xac/0x130\n  memblock_alloc_internal+0x53/0xc0\n  memblock_alloc_try_nid+0x3d/0xa0\n  swiotlb_init_remap+0x149/0x2f0\n  mem_init+0xb/0xb0\n  mm_core_init+0x8f/0x350\n  start_kernel+0x17e/0x5d0\n  x86_64_start_reservations+0x14/0x30\n  x86_64_start_kernel+0x92/0xa0\n  secondary_startup_64_no_verify+0x194/0x19b\n\nMitigate this by calling accept_memory() on the memory range returned\nbefore the slab is available.\n\nPrior to v6.12, the accept_memory() interface used a \u0027start\u0027 and \u0027end\u0027\nparameter instead of \u0027start\u0027 and \u0027size\u0027, therefore the accept_memory()\ncall must be adjusted to specify \u0027start + size\u0027 for \u0027end\u0027 when applying\nto kernels prior to v6.12."
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        "dateUpdated": "2026-05-11T21:18:25.936Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/7bcd29181bab8d508d2adfdbb132de8b1e088698"
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          "url": "https://git.kernel.org/stable/c/d66a22f6a432a9dd376c9b365d7dc89bd416909c"
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        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/da8bf5daa5e55a6af2b285ecda460d6454712ff4"
        }
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      "title": "memblock: Accept allocated memory before use in memblock_double_array()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37960",
    "datePublished": "2025-05-20T16:01:53.264Z",
    "dateReserved": "2025-04-16T04:51:23.974Z",
    "dateUpdated": "2026-05-11T21:18:25.936Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-37960\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-20T16:15:34.267\",\"lastModified\":\"2026-06-17T09:15:46.793\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmemblock: Accept allocated memory before use in memblock_double_array()\\n\\nWhen increasing the array size in memblock_double_array() and the slab\\nis not yet available, a call to memblock_find_in_range() is used to\\nreserve/allocate memory. However, the range returned may not have been\\naccepted, which can result in a crash when booting an SNP guest:\\n\\n  RIP: 0010:memcpy_orig+0x68/0x130\\n  Code: ...\\n  RSP: 0000:ffffffff9cc03ce8 EFLAGS: 00010006\\n  RAX: ff11001ff83e5000 RBX: 0000000000000000 RCX: fffffffffffff000\\n  RDX: 0000000000000bc0 RSI: ffffffff9dba8860 RDI: ff11001ff83e5c00\\n  RBP: 0000000000002000 R08: 0000000000000000 R09: 0000000000002000\\n  R10: 000000207fffe000 R11: 0000040000000000 R12: ffffffff9d06ef78\\n  R13: ff11001ff83e5000 R14: ffffffff9dba7c60 R15: 0000000000000c00\\n  memblock_double_array+0xff/0x310\\n  memblock_add_range+0x1fb/0x2f0\\n  memblock_reserve+0x4f/0xa0\\n  memblock_alloc_range_nid+0xac/0x130\\n  memblock_alloc_internal+0x53/0xc0\\n  memblock_alloc_try_nid+0x3d/0xa0\\n  swiotlb_init_remap+0x149/0x2f0\\n  mem_init+0xb/0xb0\\n  mm_core_init+0x8f/0x350\\n  start_kernel+0x17e/0x5d0\\n  x86_64_start_reservations+0x14/0x30\\n  x86_64_start_kernel+0x92/0xa0\\n  secondary_startup_64_no_verify+0x194/0x19b\\n\\nMitigate this by calling accept_memory() on the memory range returned\\nbefore the slab is available.\\n\\nPrior to v6.12, the accept_memory() interface used a \u0027start\u0027 and \u0027end\u0027\\nparameter instead of \u0027start\u0027 and \u0027size\u0027, therefore the accept_memory()\\ncall must be adjusted to specify \u0027start + size\u0027 for \u0027end\u0027 when applying\\nto kernels prior to v6.12.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: memblock: aceptar memoria asignada antes de su uso en memblock_double_array(). Al aumentar el tama\u00f1o de la matriz en memblock_double_array() y la losa a\u00fan no est\u00e1 disponible, se utiliza una llamada a memblock_find_in_range() para reservar/asignar memoria. Sin embargo, es posible que no se haya aceptado el rango devuelto, lo que puede provocar un bloqueo al iniciar un invitado SNP: RIP: 0010:memcpy_orig+0x68/0x130 C\u00f3digo: ... RSP: 0000:ffffffff9cc03ce8 EFLAGS: 00010006 RAX: ff11001ff83e5000 RBX: 0000000000000000 RCX: fffffffffffff000 RDX: 0000000000000bc0 RSI: ffffffff9dba8860 RDI: ff11001ff83e5c00 RBP: 0000000000002000 R08: 000000000000000 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 Para mitigar este problema, llame a accept_memory() en el rango de memoria devuelto antes de que el slab est\u00e9 disponible. Antes de la versi\u00f3n 6.12, la interfaz accept_memory() utilizaba los par\u00e1metros \\\"start\\\" y \\\"end\\\" en lugar de \\\"start\\\" y \\\"size\\\". Por lo tanto, la llamada a accept_memory() debe ajustarse para especificar \\\"start + size\\\" en lugar de \\\"end\\\" al aplicarlo a kernels anteriores a la versi\u00f3n 6.12.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"mm/memblock.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6\",\"lessThan\":\"7bcd29181bab8d508d2adfdbb132de8b1e088698\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6\",\"lessThan\":\"d66a22f6a432a9dd376c9b365d7dc89bd416909c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6\",\"lessThan\":\"aa513e69e011a2b19fa22ce62ce35effbd5e0c81\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6\",\"lessThan\":\"da8bf5daa5e55a6af2b285ecda460d6454712ff4\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"mm/memblock.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.5\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.5\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.92\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.29\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.14.7\",\"lessThanOrEqual\":\"6.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.15\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.5\",\"versionEndExcluding\":\"6.6.92\",\"matchCriteriaId\":\"D0DDEC71-DA9A-4DD8-9AE4-E164CFC5E573\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.29\",\"matchCriteriaId\":\"7215ABCF-8EB1-46CD-8872-8BCE4890E579\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.14.7\",\"matchCriteriaId\":\"5715A6F5-A34A-4B27-8A64-82825E963995\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"8D465631-2980-487A-8E65-40AE2B9F8ED1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4C9D071F-B28E-46EC-AC61-22B913390211\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"13FC0DDE-E513-465E-9E81-515702D49B74\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"8C7B5B0E-4EEB-48F5-B4CF-0935A7633845\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"2D240580-3048-49B2-9E27-F115A9DF8224\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/7bcd29181bab8d508d2adfdbb132de8b1e088698\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/aa513e69e011a2b19fa22ce62ce35effbd5e0c81\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d66a22f6a432a9dd376c9b365d7dc89bd416909c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/da8bf5daa5e55a6af2b285ecda460d6454712ff4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T00:10:26+00:00",
      "cve": "CVE-2025-37960",
      "id": "CVE-2025-37960",
      "initial_release_date": "2025-05-20T00:00:00+00:00",
      "product_status:known_affected": "212",
      "product_status:known_not_affected": "62",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: memblock: Accept allocated memory before use in memblock_double_array()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-37960.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T13:48:42Z",
      "cve": "CVE-2025-37960",
      "id": "CVE-2025-37960",
      "initial_release_date": "2025-05-21T00:46:19Z",
      "product_status:known_affected": "504",
      "product_status:known_not_affected": "332",
      "product_status:recommended": "400",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-37960",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-37960.json",
      "version": "39"
    }
  }
}



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