{"id":"CVE-2025-37960","state":"PUBLISHED","title":"memblock: Accept allocated memory before use in memblock_double_array()","description":"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 'start' and 'end'\nparameter instead of 'start' and 'size', therefore the accept_memory()\ncall must be adjusted to specify 'start + size' for 'end' when applying\nto kernels prior to v6.12.","publishedAt":"2025-05-20T16:01:53.264Z","updatedAt":"2026-05-11T21:18:25.936Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6","status":"affected","lessThan":"7bcd29181bab8d508d2adfdbb132de8b1e088698","versionType":"git"},{"version":"dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6","status":"affected","lessThan":"d66a22f6a432a9dd376c9b365d7dc89bd416909c","versionType":"git"},{"version":"dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6","status":"affected","lessThan":"aa513e69e011a2b19fa22ce62ce35effbd5e0c81","versionType":"git"},{"version":"dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6","status":"affected","lessThan":"da8bf5daa5e55a6af2b285ecda460d6454712ff4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/memblock.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.5","versionType":"semver"},{"version":"6.6.92","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.29","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.14.7","status":"unaffected","lessThanOrEqual":"6.14.*","versionType":"semver"},{"version":"6.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/memblock.c"]}],"references":["https://git.kernel.org/stable/c/7bcd29181bab8d508d2adfdbb132de8b1e088698","https://git.kernel.org/stable/c/d66a22f6a432a9dd376c9b365d7dc89bd416909c","https://git.kernel.org/stable/c/aa513e69e011a2b19fa22ce62ce35effbd5e0c81","https://git.kernel.org/stable/c/da8bf5daa5e55a6af2b285ecda460d6454712ff4"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:03.054Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/37xxx/CVE-2025-37960.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-37960","state":"PUBLISHED","datePublished":"2025-05-20T16:01:53.264Z","dateUpdated":"2026-05-11T21:18:25.936Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:23.974Z"},"containers":{"cna":{"title":"memblock: Accept allocated memory before use in memblock_double_array()","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 'start' and 'end'\nparameter instead of 'start' and 'size', therefore the accept_memory()\ncall must be adjusted to specify 'start + size' for 'end' when applying\nto kernels prior to v6.12."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6","status":"affected","lessThan":"7bcd29181bab8d508d2adfdbb132de8b1e088698","versionType":"git"},{"version":"dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6","status":"affected","lessThan":"d66a22f6a432a9dd376c9b365d7dc89bd416909c","versionType":"git"},{"version":"dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6","status":"affected","lessThan":"aa513e69e011a2b19fa22ce62ce35effbd5e0c81","versionType":"git"},{"version":"dcdfdd40fa82b6704d2841938e5c8ec3051eb0d6","status":"affected","lessThan":"da8bf5daa5e55a6af2b285ecda460d6454712ff4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/memblock.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.5","versionType":"semver"},{"version":"6.6.92","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.29","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.14.7","status":"unaffected","lessThanOrEqual":"6.14.*","versionType":"semver"},{"version":"6.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/memblock.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/7bcd29181bab8d508d2adfdbb132de8b1e088698"},{"url":"https://git.kernel.org/stable/c/d66a22f6a432a9dd376c9b365d7dc89bd416909c"},{"url":"https://git.kernel.org/stable/c/aa513e69e011a2b19fa22ce62ce35effbd5e0c81"},{"url":"https://git.kernel.org/stable/c/da8bf5daa5e55a6af2b285ecda460d6454712ff4"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:18:25.936Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.6.92"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.12.29"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.14.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.15"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}