CVE-2026-93172

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

CVSS

No CVSS.

References

Link	Resource
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/bc3b5e6519b8df22d622a03eab6772784da97db4

Configurations

No configuration.

History

17 Sep 2026, 17:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 17:18

Updated : 2026-09-17 17:18

NVD link : CVE-2026-93172

Mitre link : CVE-2026-93172

CVE.ORG link : CVE-2026-93172

JSON object : View

Products Affected

No product.

CWE

No CWE.

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