CVE-2026-93172Hinoki check available

Kernel crash via unchecked memory-hotplug allocation failure

Published Sep 17, 2026 · Updated Sep 17, 2026

NULL dereference in Linux memory hotplug allows local users to crash the kernel when per-CPU statistics allocation fails. In mm/mm_init.c, free_area_init_core_hotplug fails to check alloc_percpu before accessing pgdat->per_cpu_nodestats through per-CPU offsets. Triggering the fault requires memory hotplug initialization and allocation failure; the published assessment requires administrative privileges and identifies no data disclosure or modification.

CVSS severity4.1
Medium
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

NULL dereference in Linux memory hotplug allows local users to crash the kernel when per-CPU statistics allocation fails. In mm/mm_init.c, free_area_init_core_hotplug fails to check alloc_percpu before accessing pgdat->per_cpu_nodestats through per-CPU offsets. Triggering the fault requires memory hotplug initialization and allocation failure; the published assessment requires administrative privileges and identifies no data disclosure or modification.

The record

CVE
CVE-2026-93172
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.8
  2. Affected versionversion=75ef7184053989118d3814c558a9af62e7376a58 <1017fe1c7f48e511c5a680e3057005daaff2f3a2
  3. Affected versionversion=75ef7184053989118d3814c558a9af62e7376a58 <2ebce860bdd7ae5e13002811bc9bbbf33fcfc221
  4. Affected versionversion=75ef7184053989118d3814c558a9af62e7376a58 <4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc
  5. Affected versionversion=75ef7184053989118d3814c558a9af62e7376a58 <bc3b5e6519b8df22d622a03eab6772784da97db4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=75ef7184053989118d3814c558a9af62e7376a58 <1017fe1c7f48e511c5a680e3057005daaff2f3a2; version=75ef7184053989118d3814c558a9af62e7376a58 <2ebce860bdd7ae5e13002811bc9bbbf33fcfc221; version=75ef7184053989118d3814c558a9af62e7376a58 <4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc; version=75ef7184053989118d3814c558a9af62e7376a58 <bc3b5e6519b8df22d622a03eab6772784da97db4

Published CVSS scores

4.1Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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