CVE-2026-93218Hinoki check available

Kernel panic via device-private PMD race

Published Sep 24, 2026 · Updated Sep 24, 2026

A memory-management vulnerability in Linux kernel 6.19 allows local users to trigger a kernel panic via a huge-page race. In madvise_free_huge_pmd(), an HMM GPU migration can replace a checked PMD with a device-private entry before locking, leading to pmd_folio() on a non-present entry. The trigger requires local access, an HMM-capable GPU driver, and a concurrent madvise(MADV_FREE) race; impact is service interruption through a kernel panic.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

A memory-management vulnerability in Linux kernel 6.19 allows local users to trigger a kernel panic via a huge-page race. In madvise_free_huge_pmd(), an HMM GPU migration can replace a checked PMD with a device-private entry before locking, leading to pmd_folio() on a non-present entry. The trigger requires local access, an HMM-capable GPU driver, and a concurrent madvise(MADV_FREE) race; impact is service interruption through a kernel panic.

The record

CVE
CVE-2026-93218
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1529
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 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=368076f52ebeecd33e10a9f80905d7508b6b6149 <5e3026bf736498115884d6c7bd0308ba29e0474c
  2. Affected versionversion=368076f52ebeecd33e10a9f80905d7508b6b6149 <ce579dcf730ce5ed8043a5eeea18a3e6706a97e5
  3. Affected versionversion=6.19

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=368076f52ebeecd33e10a9f80905d7508b6b6149 <5e3026bf736498115884d6c7bd0308ba29e0474c; version=368076f52ebeecd33e10a9f80905d7508b6b6149 <ce579dcf730ce5ed8043a5eeea18a3e6706a97e5; version=6.19

Published CVSS scores

No CVSS assessment is available in this record.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1529System Shutdown/Reboot

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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