CVE-2026-53108

Local system crash via PMD migration race

Published Jun 24, 2026 · Updated Jun 24, 2026

Race condition in the Linux kernel 5.8 through 7.0.9 allows local users to crash PowerPC64 systems via concurrent page migration and unmapping. During move_pages, set_pmd_migration_entry leaves a PMD migration swap entry that concurrent munmap processing treats as a present huge PMD before pmdp_huge_get_and_clear_full asserts. Triggering the kernel BUG requires a local user to race migration of a PMD-sized transparent or device-private huge page against unmapping, interrupting the affected system.

CVSS severity4.7
Medium
EPSS probability0.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel 5.8 through 7.0.9 allows local users to crash PowerPC64 systems via concurrent page migration and unmapping. During move_pages, set_pmd_migration_entry leaves a PMD migration swap entry that concurrent munmap processing treats as a present huge PMD before pmdp_huge_get_and_clear_full asserts. Triggering the kernel BUG requires a local user to race migration of a PMD-sized transparent or device-private huge page against unmapping, interrupting the affected system.

The record

CVE
CVE-2026-53108
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-362, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 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=5.8
  2. Affected versionversion=75358ea359e7c0dfceb3c7b3d854570b4260cb7f <829367e55012c053738ebe7db20c4a90d6609ece
  3. Affected versionversion=75358ea359e7c0dfceb3c7b3d854570b4260cb7f <bbcbf045d6c778e82b47a35fc8728387708e9a3d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.8; version=75358ea359e7c0dfceb3c7b3d854570b4260cb7f <829367e55012c053738ebe7db20c4a90d6609ece; version=75358ea359e7c0dfceb3c7b3d854570b4260cb7f <bbcbf045d6c778e82b47a35fc8728387708e9a3d

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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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