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CVE-2026-64336

Published Jul 25, 2026 EPSS 0.18% (7th pctl)

Overview

CVE-2026-64336 is a known-severity vulnerability. It was published on July 25, 2026.

Technical Description

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

USB: serial: keyspan_pda: fix information leak

The write() callback is supposed to return the number of characters

accepted or a negative errno. Since the addition of write fifo support

the keyspan_pda implementation will however return the number characters

submitted to the device if the write urb is not already in use. If this

number is larger than the number of characters passed to write(), the

line discipline continues writing data from beyond the tty write buffer.

Fix the information leak by making sure that keyspan_pda_write_start()

returns zero on success as intended.

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/2f7a6b8ab3845bd1da02604f1a874b52a4555a72 Ref git.kernel.org/stable/c/6bfc8d01ac4068eced509f8fc74d0cd205e4dcec Ref git.kernel.org/stable/c/b069b7029862fafaff331d4c664d97d4ae828d6d Ref git.kernel.org/stable/c/cccef1711efbcdbe999738ac27d37b9ef6271abd Ref git.kernel.org/stable/c/cf6ca0aefae03958cfb5b189b0adbfb25c06bfac Ref git.kernel.org/stable/c/d4b12b6b395e43a2b1d80be3745631fcaa9c047b Ref git.kernel.org/stable/c/e1494191a3aac665d3a2fce16169a97c346253ec Ref git.kernel.org/stable/c/e52ca411f50539ff1d0c877b9312771ca8a858c1

Frequently Asked Questions

What is CVE-2026-64336?

CVE-2026-64336 is a known-severity vulnerability. It was published on July 25, 2026.

How severe is CVE-2026-64336?

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-2026-64336?

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-2026-64336?

CyberStrike's AI-powered security agents can automatically detect CVE-2026-64336 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.

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