CVE-2026-74460
Received Received - Intake

BaseFortify

Publication date: 2026-08-15

Last updated on: 2026-08-15

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: can: ems_usb: validate CPC message lengths ems_usb_read_bulk_callback() walks CPC messages packed in one USB receive buffer. Check that each declared message fits in the URB payload. Also require the type-specific payload to cover the fields used by the CAN, state, error and overrun handlers.

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Meta Information

Published
2026-08-15
Last Modified
2026-08-15
Generated
2026-08-15
AI Q&A
2026-08-15
EPSS Evaluated
N/A
NVD
CVE-2026-74460
EUVD
EUVD-2026-59653

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves the ems_usb CAN driver. The issue occurs when processing CPC messages in a USB receive buffer. The driver fails to validate message lengths properly, potentially allowing malformed messages to be processed. This could lead to buffer overflows or incorrect handling of CAN protocol data.

Detection Guidance

This vulnerability is specific to the Linux kernel's CAN subsystem and the ems_usb driver. Detection requires checking kernel logs for errors related to malformed CPC messages or USB URB payloads. Monitor dmesg or journalctl for CAN-related errors. No direct commands are provided in the context.

Impact Analysis

If exploited, this flaw could allow an attacker to cause a denial of service or execute arbitrary code on systems using the affected CAN driver. It may crash the system or enable unauthorized access to sensitive data transmitted over CAN networks.

Mitigation Strategies

Update the Linux kernel to the patched version that resolves this issue. If using a vulnerable kernel, avoid using the ems_usb driver for CAN interfaces until patched. Monitor kernel security advisories for updates.

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