SB20260727224 - Out-of-bounds read in Linux kernel net usb driver

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260727224

SB20260727224 - Out-of-bounds read in Linux kernel net usb driver

Published: July 27, 2026

Security Bulletin ID SB20260727224
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Physical access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-64351)

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

CVSSv4: 2.4 [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]


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

The vulnerability exists due to an out-of-bounds read in kalmia_rx_fixup() when processing a crafted short bulk-in frame from a USB device. An attacker with physical access can provide malformed frame lengths to disclose sensitive information.

The issue occurs when framing headers are not both present before frame-length subtraction, causing an integer underflow that lets a device-supplied packet length drive buffer access past the end of the rx buffer.


Remediation

Install update from vendor's website.

References