SB2026100758 - Out-of-bounds write in Linux kernel usb 6fire

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026100758

SB2026100758 - Out-of-bounds write in Linux kernel usb 6fire

Published: October 7, 2026

Security Bulletin ID SB2026100758
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-98312)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to an out-of-bounds write in usb6fire_pcm_in_urb_handler() in the ALSA 6fire driver when calculating outgoing isochronous packet sizes from device-reported input lengths. A local user can supply isochronous packets whose reported lengths cause output buffer writes to exceed the allocated buffer to cause a denial of service.

Zero-length isochronous packets are legal on the USB bus. At 88.2/96 kHz, eight full 420-byte input packets can produce 5024 bytes of output for a 4832-byte buffer.


Remediation

Install update from vendor's website.

References