CVE-2026-93172
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Received - Intake
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Vulnerability report for CVE-2026-93172, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-09-17
Last updated on: 2026-09-17
Assigner: kernel.org
Description
Description
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 Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | 75ef7184053989118d3814c558a9af62e7376a58 |
| Linux | Linux | 75ef7184053989118d3814c558a9af62e7376a58 |
| Linux | Linux | 75ef7184053989118d3814c558a9af62e7376a58 |
| Linux | Linux | 75ef7184053989118d3814c558a9af62e7376a58 |
| Linux | Linux | 4.8 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
