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CVE-2026-63956

In the Linux kernel, the following vulnerability has been resolved: USB: serial: cypress_m8: fix memory corruption with small endpoint Make sure that the interrupt-out endpoint max packet size is…

Published Jul 19, 2026EPSS 0.22%

Overview

CVE-2026-63956 is a known-severity vulnerability. It was published on July 19, 2026.

Technical description

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

USB: serial: cypress_m8: fix memory corruption with small endpoint

Make sure that the interrupt-out endpoint max packet size is at least

eight bytes to avoid user-controlled slab corruption or NULL-pointer

dereference should a malicious device report a smaller size.

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/1ef25704bd3b625fd151c09feee459479f71ee64Refgit.kernel.org/stable/c/284105c40fc31fff90cdab8a0377aaeb92f87f0eRefgit.kernel.org/stable/c/4bcaa59f403dbde6328604a500d65ee8d40975d9Refgit.kernel.org/stable/c/4fcb22218f0a7229b7ce3b3952fb644def293fa5Refgit.kernel.org/stable/c/52e18ae0c47c5c89e18fcd8022f287f7cc8802ecRefgit.kernel.org/stable/c/6c13f3bb652bc8665e709ba07122612586aea648Refgit.kernel.org/stable/c/ad3d1628a46134276546d7a12fedf04be9979158Refgit.kernel.org/stable/c/e1a9d791fd66ab2431b9e6f6f835823809869047

How CyberStrike helps

Frequently asked questions

What is CVE-2026-63956?

CVE-2026-63956 is a known-severity vulnerability. It was published on July 19, 2026.

How severe is CVE-2026-63956?

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-2026-63956?

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-2026-63956?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-63956 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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