{"id":"CVE-2025-37960","summary":"memblock: Accept allocated memory before use in memblock_double_array()","details":"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.","modified":"2026-04-02T12:47:41.259463Z","published":"2025-05-20T16:01:53.264Z","related":["SUSE-SU-2025:01919-1","SUSE-SU-2025:01951-1","SUSE-SU-2025:01964-1","SUSE-SU-2025:01965-1","SUSE-SU-2025:01967-1","SUSE-SU-2025:01972-1","SUSE-SU-2025:02000-1","SUSE-SU-2025:20408-1","SUSE-SU-2025:20413-1","SUSE-SU-2025:20419-1","SUSE-SU-2025:20421-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37960.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/7bcd29181bab8d508d2adfdbb132de8b1e088698"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aa513e69e011a2b19fa22ce62ce35effbd5e0c81"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d66a22f6a432a9dd376c9b365d7dc89bd416909c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/da8bf5daa5e55a6af2b285ecda460d6454712ff4"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37960.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-37960"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.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"}}],"schema_version":"1.7.5"}