{"cve":"CVE-2026-93172","nvd":{"published":"2026-09-17T17:18:12.943","modified":"2026-10-21T13:21:01.430","status":"Received","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","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/1017fe1c7f48e511c5a680e3057005daaff2f3a2","https://git.kernel.org/stable/c/2ebce860bdd7ae5e13002811bc9bbbf33fcfc221","https://git.kernel.org/stable/c/4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc","https://git.kernel.org/stable/c/4dda09e7ca0bf0c3fa7c5c8f134d9804b67f455c","https://git.kernel.org/stable/c/bc3b5e6519b8df22d622a03eab6772784da97db4"],"products":[],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-93172","score":0.00201,"percentile":0.09855,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}