{"api_version":"1","generated_at":"2026-09-19T06:01:55+00:00","cve":"CVE-2026-93172","urls":{"html":"https://cve.report/CVE-2026-93172","api":"https://cve.report/api/cve/CVE-2026-93172.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93172","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93172"},"summary":{"title":"mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug\n\nWe miss a failed allocation check for pgdat->per_cpu_nodestats, which\nresults in a NULL deref when we offset into the per-cpu area.\n\nPropagate -ENOMEM up the stack and leave per_cpu_nodestats pointing\nat boot_nodestats so a later online can retry the allocation.\n\nhotadd_init_pgdat() returns NULL on failure, which __try_online_node()\nalready maps to -ENOMEM.\n\nOn failure nothing needs to be unwound:\n  - the node is never marked online\n  - per_cpu_nodestats is left pointing at boot_nodestats\n  - __add_memory_resource() cleans up pending memblock resources\n  - later online attempts retry the per_cpu_nodestats allocation","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:18:12","updated_at":"2026-09-17 17:18:12"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/2ebce860bdd7ae5e13002811bc9bbbf33fcfc221","name":"https://git.kernel.org/stable/c/2ebce860bdd7ae5e13002811bc9bbbf33fcfc221","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1017fe1c7f48e511c5a680e3057005daaff2f3a2","name":"https://git.kernel.org/stable/c/1017fe1c7f48e511c5a680e3057005daaff2f3a2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bc3b5e6519b8df22d622a03eab6772784da97db4","name":"https://git.kernel.org/stable/c/bc3b5e6519b8df22d622a03eab6772784da97db4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc","name":"https://git.kernel.org/stable/c/4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93172","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93172","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 75ef7184053989118d3814c558a9af62e7376a58 4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 75ef7184053989118d3814c558a9af62e7376a58 bc3b5e6519b8df22d622a03eab6772784da97db4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 75ef7184053989118d3814c558a9af62e7376a58 1017fe1c7f48e511c5a680e3057005daaff2f3a2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 75ef7184053989118d3814c558a9af62e7376a58 2ebce860bdd7ae5e13002811bc9bbbf33fcfc221 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"93172","cve":"CVE-2026-93172","epss":"0.002000000","percentile":"0.101550000","score_date":"2026-09-18","updated_at":"2026-09-19 00:06:17"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/linux/memory_hotplug.h","mm/memory_hotplug.c","mm/mm_init.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc","status":"affected","version":"75ef7184053989118d3814c558a9af62e7376a58","versionType":"git"},{"lessThan":"bc3b5e6519b8df22d622a03eab6772784da97db4","status":"affected","version":"75ef7184053989118d3814c558a9af62e7376a58","versionType":"git"},{"lessThan":"1017fe1c7f48e511c5a680e3057005daaff2f3a2","status":"affected","version":"75ef7184053989118d3814c558a9af62e7376a58","versionType":"git"},{"lessThan":"2ebce860bdd7ae5e13002811bc9bbbf33fcfc221","status":"affected","version":"75ef7184053989118d3814c558a9af62e7376a58","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["include/linux/memory_hotplug.h","mm/memory_hotplug.c","mm/mm_init.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.8"},{"lessThan":"4.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"4.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug\n\nWe miss a failed allocation check for pgdat->per_cpu_nodestats, which\nresults in a NULL deref when we offset into the per-cpu area.\n\nPropagate -ENOMEM up the stack and leave per_cpu_nodestats pointing\nat boot_nodestats so a later online can retry the allocation.\n\nhotadd_init_pgdat() returns NULL on failure, which __try_online_node()\nalready maps to -ENOMEM.\n\nOn failure nothing needs to be unwound:\n  - the node is never marked online\n  - per_cpu_nodestats is left pointing at boot_nodestats\n  - __add_memory_resource() cleans up pending memblock resources\n  - later online attempts retry the per_cpu_nodestats allocation"}],"providerMetadata":{"dateUpdated":"2026-09-17T16:12:02.544Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc"},{"url":"https://git.kernel.org/stable/c/bc3b5e6519b8df22d622a03eab6772784da97db4"},{"url":"https://git.kernel.org/stable/c/1017fe1c7f48e511c5a680e3057005daaff2f3a2"},{"url":"https://git.kernel.org/stable/c/2ebce860bdd7ae5e13002811bc9bbbf33fcfc221"}],"title":"mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93172","datePublished":"2026-09-17T16:12:02.544Z","dateReserved":"2026-09-17T16:02:15.090Z","dateUpdated":"2026-09-17T16:12:02.544Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:18:12","lastModifiedDate":"2026-09-17 17:18:12","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93172","Ordinal":"1","Title":"mm/mm_init: handle alloc_percpu failure in free_area_init_core_h","CVE":"CVE-2026-93172","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93172","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug\n\nWe miss a failed allocation check for pgdat->per_cpu_nodestats, which\nresults in a NULL deref when we offset into the per-cpu area.\n\nPropagate -ENOMEM up the stack and leave per_cpu_nodestats pointing\nat boot_nodestats so a later online can retry the allocation.\n\nhotadd_init_pgdat() returns NULL on failure, which __try_online_node()\nalready maps to -ENOMEM.\n\nOn failure nothing needs to be unwound:\n  - the node is never marked online\n  - per_cpu_nodestats is left pointing at boot_nodestats\n  - __add_memory_resource() cleans up pending memblock resources\n  - later online attempts retry the per_cpu_nodestats allocation","Type":"Description","Title":"mm/mm_init: handle alloc_percpu failure in free_area_init_core_h"}]}}}