CVE-2026-53288

Boot interruption via early page-table under-allocation

Published Jun 26, 2026 · Updated Jun 26, 2026

Availability flaw in the Linux Kernel 6.12.54 through 6.12.90 on arm64 allows local users to interrupt boot on 4K-page systems. The arm64 early mapper reserves too few page-table pages after an added [_text, _stext) split, so the final [data, end) mapping can overflow init_pg_end into the gap before early_init_stack. Exploitation requires local low privileges and an affected arm64 kernel using 4K pages; the published impact is a kernel availability failure without confidentiality or integrity loss.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Availability flaw in the Linux Kernel 6.12.54 through 6.12.90 on arm64 allows local users to interrupt boot on 4K-page systems. The arm64 early mapper reserves too few page-table pages after an added [_text, _stext) split, so the final [data, end) mapping can overflow init_pg_end into the gap before early_init_stack. Exploitation requires local low privileges and an affected arm64 kernel using 4K pages; the published impact is a kernel availability failure without confidentiality or integrity loss.

The record

CVE
CVE-2026-53288
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-674
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5973a62efa34c80c9a4e5eac1fca6f6209b902af <4d8e74ad4585672489da6145b3328d415f50db82
  2. Affected versionversion=5973a62efa34c80c9a4e5eac1fca6f6209b902af <9fe9e3acaa14921b0cf0d6cc2de5b562499bf721
  3. Affected versionversion=5973a62efa34c80c9a4e5eac1fca6f6209b902af <dcb89deed40ba55ff7020061712fdabf098cc2cc
  4. Affected versionversion=6.12.54 <6.12.91
  5. Affected versionversion=6.17.4 <6.18
  6. Affected versionversion=6.18
  7. Affected versionversion=88025faf2aa08c7468d68d8cb31a53b55aae6ee0
  8. Affected versionversion=fdd380a5950503a07aaaf74536a0c2f223475eb0 <a4ff33053da0a34b14abb5c96dc5a48379e26fce

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5973a62efa34c80c9a4e5eac1fca6f6209b902af <4d8e74ad4585672489da6145b3328d415f50db82; version=5973a62efa34c80c9a4e5eac1fca6f6209b902af <9fe9e3acaa14921b0cf0d6cc2de5b562499bf721; version=5973a62efa34c80c9a4e5eac1fca6f6209b902af <dcb89deed40ba55ff7020061712fdabf098cc2cc; version=6.12.54 <6.12.91; version=6.17.4 <6.18; version=6.18; version=88025faf2aa08c7468d68d8cb31a53b55aae6ee0; version=fdd380a5950503a07aaaf74536a0c2f223475eb0 <a4ff33053da0a34b14abb5c96dc5a48379e26fce

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-674Uncontrolled Recursion

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo