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CVE-2026-93172

unscored Published
NVD · CVE.org

In the Linux kernel, the following vulnerability has been resolved: mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug We miss a failed allocation check for pgdat->per_cpu_nodestats, which results in a NULL deref when we offset into the per-cpu area. Propagate -ENOMEM up the stack and leave per_cpu_nodestats pointing at boot_nodestats so a later online can retry the allocation. hotadd_init_pgdat() returns NULL on failure, which __try_online_node() already maps to -ENOMEM. On failure nothing needs to be unwound: - the node is never marked online - per_cpu_nodestats is left pointing at boot_nodestats - __add_memory_resource() cleans up pending memblock resources - later online attempts retry the per_cpu_nodestats allocation

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 5

  1. StatusReceived → PublishedNVD modified 2026-10-21 12:52
  2. References+1 references (now 5)NVD modified 2026-10-21 13:21
  3. StatusPublished → ReceivedNVD modified 2026-10-21 13:21
  4. StatusReceived → PublishedNVD modified 2026-10-19 09:06
  5. First seenunscoredNVD modified 2026-10-19 10:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 5