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CVE-2026-23307

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: can: ems_usb: ems_usb_read_bulk_callback(): check the proper length of a message When looking at the data in a USB urb, the act…

Published Mar 25, 2026EPSS 0.12%

Overview

CVE-2026-23307 is a medium-severity vulnerability. It was published on March 25, 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:

can: ems_usb: ems_usb_read_bulk_callback(): check the proper length of a message

When looking at the data in a USB urb, the actual_length is the size of

the buffer passed to the driver, not the transfer_buffer_length which is

set by the driver as the max size of the buffer.

When parsing the messages in ems_usb_read_bulk_callback() properly check

the size both at the beginning of parsing the message to make sure it is

big enough for the expected structure, and at the end of the message to

make sure we don't overflow past the end of the buffer for the next

message.

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/1818974e1b5ef200e27f144c8cb8a246420bb54dRefgit.kernel.org/stable/c/18f75b9cbdc3703f15965425ab69dee509b07785Refgit.kernel.org/stable/c/1cf469026d4a2308eaa91d04dca4a900d07a5c2eRefgit.kernel.org/stable/c/2833e13e2b099546abf5d40a483b4eb04ddd1f7bRefgit.kernel.org/stable/c/38a01c9700b0dcafe97dfa9dc7531bf4a245deffRefgit.kernel.org/stable/c/aed172a2e2330131f0977d2acd3ec8883f413ec1Refgit.kernel.org/stable/c/c703bbf8e9b4947e111c88d2ed09236a6772a471Refgit.kernel.org/stable/c/f10177e6c4575aedaea580ce67d792fab7a2235e

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23307?

CVE-2026-23307 is a medium-severity vulnerability. It was published on March 25, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-23307?

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-2026-23307?

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-2026-23307?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23307 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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