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CVE-2026-53288

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: arm64: Reserve an extra page for early kernel mapping The final part of [data, end) segment may overflow into the next page of…

Published Jun 26, 2026CWE-674EPSS 0.16%

Overview

CVE-2026-53288 is a medium-severity vulnerability. It was published on June 26, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

arm64: Reserve an extra page for early kernel mapping

The final part of [data, end) segment may overflow into the next page of

init_pg_end[1] which is the gap page before early_init_stack[2]:

[1]

crash_arm64_v9.0.1> vtop ffffffed00601000

VIRTUAL PHYSICAL

ffffffed00601000 83401000

PAGE DIRECTORY: ffffffecffd62000

PGD: ffffffecffd62da0 => 10000000833fb003

PMD: ffffff80033fb018 => 10000000833fe003

PTE: ffffff80033fe008 => 68000083401f03

PAGE: 83401000

PTE PHYSICAL FLAGS

68000083401f03 83401000 (VALID|SHARED|AF|NG|PXN|UXN)

PAGE PHYSICAL MAPPING INDEX CNT FLAGS

fffffffec00d0040 83401000 0 0 1 4000 reserved

[2]

ffffffed002c8000 (r) __pi__data

ffffffed0054e000 (d) __pi___bss_start

ffffffed005f5000 (b) __pi_init_pg_dir

ffffffed005fe000 (b) __pi_init_pg_end

ffffffed005ff000 (B) early_init_stack

ffffffed00608000 (b) __pi__end

For 4K pages,

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/4d8e74ad4585672489da6145b3328d415f50db82Refgit.kernel.org/stable/c/9fe9e3acaa14921b0cf0d6cc2de5b562499bf721Refgit.kernel.org/stable/c/a4ff33053da0a34b14abb5c96dc5a48379e26fceRefgit.kernel.org/stable/c/dcb89deed40ba55ff7020061712fdabf098cc2cc

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53288?

CVE-2026-53288 is a medium-severity vulnerability. It was published on June 26, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-53288?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-53288?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-53288?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53288 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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