CVE-2026-98373

Kernel panic via incorrect HugeTLB remap advance

Published Oct 7, 2026 · Updated Oct 7, 2026

A memory-management flaw in Linux 6.0 and later allows local users with HugeTLB access to crash the kernel through mremap(). In move_hugetlb_page_tables(), the skip path advances the destination to its own page-table boundary rather than preserving the source-to-destination address delta. The fault requires a HugeTLB remap with differing source and destination offsets; the published reproducer triggered a kernel panic on x86-64.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A memory-management flaw in Linux 6.0 and later allows local users with HugeTLB access to crash the kernel through mremap(). In move_hugetlb_page_tables(), the skip path advances the destination to its own page-table boundary rather than preserving the source-to-destination address delta. The fault requires a HugeTLB remap with differing source and destination offsets; the published reproducer triggered a kernel panic on x86-64.

The record

CVE
CVE-2026-98373
Published
Oct 7, 2026
Updated
Oct 7, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 7, 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=6.0
  2. Affected versionversion=e95a9851787bbb3cd4deb40fe8bab03f731852d1 <480a39b0a12c977ed6e755f3d12a23424c57d11f
  3. Affected versionversion=e95a9851787bbb3cd4deb40fe8bab03f731852d1 <7a96b0f657c8d799ea5b8e02fc9ec7cca0e6e7ff
  4. Affected versionversion=e95a9851787bbb3cd4deb40fe8bab03f731852d1 <850cc4a84b36a0062dcd0391acd2450e20ab0767
  5. Affected versionversion=e95a9851787bbb3cd4deb40fe8bab03f731852d1 <9bdad082d44bdcf93716973dcba6be77e8a06e7b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.0; version=e95a9851787bbb3cd4deb40fe8bab03f731852d1 <480a39b0a12c977ed6e755f3d12a23424c57d11f; version=e95a9851787bbb3cd4deb40fe8bab03f731852d1 <7a96b0f657c8d799ea5b8e02fc9ec7cca0e6e7ff; version=e95a9851787bbb3cd4deb40fe8bab03f731852d1 <850cc4a84b36a0062dcd0391acd2450e20ab0767; version=e95a9851787bbb3cd4deb40fe8bab03f731852d1 <9bdad082d44bdcf93716973dcba6be77e8a06e7b

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application 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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