SB20260727243 - Out-of-bounds read in Linux kernel usb misc driver

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-64339)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows an attacker with physical access to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in usbio_bulk_msg() when processing a crafted bulk IN response from a malicious USB device. An attacker with physical access can supply a device that reports a response length larger than the received transfer to disclose sensitive information.

The issue affects the bulk data path; the control path is not affected.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/48394f94211cf8fe0ea8604fc441633abf90fc94
• https://git.kernel.org/stable/c/8c6314489550fa81d41723a0ff33f655b5b6c7b6
• https://git.kernel.org/stable/c/fc1b546973c1442d5b947fcdd03581f20ecc5bd2