{"id":"CVE-2024-45022","summary":"mm/vmalloc: fix page mapping if vm_area_alloc_pages() with high order fallback to order 0","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmalloc: fix page mapping if vm_area_alloc_pages() with high order fallback to order 0\n\nThe __vmap_pages_range_noflush() assumes its argument pages** contains\npages with the same page shift.  However, since commit e9c3cda4d86e (\"mm,\nvmalloc: fix high order __GFP_NOFAIL allocations\"), if gfp_flags includes\n__GFP_NOFAIL with high order in vm_area_alloc_pages() and page allocation\nfailed for high order, the pages** may contain two different page shifts\n(high order and order-0).  This could lead __vmap_pages_range_noflush() to\nperform incorrect mappings, potentially resulting in memory corruption.\n\nUsers might encounter this as follows (vmap_allow_huge = true, 2M is for\nPMD_SIZE):\n\nkvmalloc(2M, __GFP_NOFAIL|GFP_X)\n    __vmalloc_node_range_noprof(vm_flags=VM_ALLOW_HUGE_VMAP)\n        vm_area_alloc_pages(order=9) ---\u003e order-9 allocation failed and fallback to order-0\n            vmap_pages_range()\n                vmap_pages_range_noflush()\n                    __vmap_pages_range_noflush(page_shift = 21) ----\u003e wrong mapping happens\n\nWe can remove the fallback code because if a high-order allocation fails,\n__vmalloc_node_range_noprof() will retry with order-0.  Therefore, it is\nunnecessary to fallback to order-0 here.  Therefore, fix this by removing\nthe fallback code.","modified":"2026-04-02T12:18:39.478850Z","published":"2024-09-11T15:13:55.837Z","related":["SUSE-SU-2024:3551-1","SUSE-SU-2024:3553-1","SUSE-SU-2024:3561-1","SUSE-SU-2024:3564-1","SUSE-SU-2025:20073-1","SUSE-SU-2025:20077-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/45xxx/CVE-2024-45022.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/61ebe5a747da649057c37be1c37eb934b4af79ca"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c91618816f4d21fc574d7577a37722adcd4075b2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/de7bad86345c43cd040ed43e20d9fad78a3ee59f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fd1ffbb50ef4da5e1378a46616b6d7407dc795da"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/45xxx/CVE-2024-45022.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-45022"},{"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":"fe5c2bdcb14c8612eb5e7a09159801c7219e9ac4"},{"fixed":"fd1ffbb50ef4da5e1378a46616b6d7407dc795da"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e9c3cda4d86e56bf7fe403729f38c4f0f65d3860"},{"fixed":"de7bad86345c43cd040ed43e20d9fad78a3ee59f"},{"fixed":"c91618816f4d21fc574d7577a37722adcd4075b2"},{"fixed":"61ebe5a747da649057c37be1c37eb934b4af79ca"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-45022.json"}}],"schema_version":"1.7.5"}