CVE-2026-80640

Published Aug 28, 2026

Overview

CVE-2026-80640 is a known-severity vulnerability. It was published on August 28, 2026.

Technical Description

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

cxl/fwctl: Fix __fortify_panic

Fix a runtime assertion in cxlctl_get_supported_features(). Fortify

complains that it is potentially overflowing the entries array per

__counted_by_le(num_entries). Quiet the false positive by initializing

@num_entries earlier.

memcpy: detected buffer overflow: 48 byte write of buffer size 0

WARNING: lib/string_helpers.c:1036 at __fortify_report+0x4d/0xa0, CPU#7: fwctl/1398

RIP: 0010:__fortify_report+0x50/0xa0

Call Trace:

__fortify_panic+0xd/0xf

cxlctl_get_supported_features.cold+0x23/0x35 [cxl_core]

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

Ref git.kernel.org/stable/c/18c67ecc5dafe14055edcea53f36f4e31df1816b Ref git.kernel.org/stable/c/6c9d2e87df40d606f1c85143e9acb1ecff463d5e Ref git.kernel.org/stable/c/b8d15e85596ad8993d42e0703a9741961a2f03eb

Frequently Asked Questions

What is CVE-2026-80640?

CVE-2026-80640 is a known-severity vulnerability. It was published on August 28, 2026.

How severe is CVE-2026-80640?

CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.

How do I fix or remediate CVE-2026-80640?

How can CyberStrike help with CVE-2026-80640?

CyberStrike's AI-powered security agents can automatically detect CVE-2026-80640 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.