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CVE-2026-80723

8.4 · HIGH

In the Linux kernel, the following vulnerability has been resolved: of: reserved_mem: prevent OOB when too many dynamic regions are defined On boot, fdt_scan_reserved_mem() saves each dynamically…

Published Aug 28, 2026EPSS 0.13%

Overview

CVE-2026-80723 is a high-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 8.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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

of: reserved_mem: prevent OOB when too many dynamic regions are defined

On boot, fdt_scan_reserved_mem() saves each dynamically-placed

/reserved-memory subnode into a local array of size

MAX_RESERVED_REGIONS.

If the device tree defines more than MAX_RESERVED_REGIONS

dynamically-placed regions, fdt_scan_reserved_mem() writes past the

end of the local array.

Add a bounds check that logs an error and skips the excess regions,

restoring the original behavior.

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/68d27250c9e81ab7764603e346c2b1017cb53adfRefgit.kernel.org/stable/c/cfa7e2734877330d6c10e0f33953905486c4530cRefgit.kernel.org/stable/c/db3dbdfea1b8f38774419c5c2c14e4b81c48708dRefgit.kernel.org/stable/c/de8ccbd6bf4efe7a059e2c483789936009e10f42

How CyberStrike helps

Frequently asked questions

What is CVE-2026-80723?

CVE-2026-80723 is a high-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 8.4 (HIGH).

How severe is CVE-2026-80723?

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-80723?

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-2026-80723?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-80723 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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