SB20261022454 - Out-of-bounds write in Linux kernel usb line6

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Main Vulnerability Database SB20261022454

SB20261022454 - Out-of-bounds write in Linux kernel usb line6

Published: October 22, 2026

Security Bulletin ID SB20261022454
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Physical access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-98836)

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

CVSSv4: 5.2 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows an attacker with physical access to system to corrupt kernel memory, potentially causing a denial of service.

The vulnerability exists due to an out-of-bounds write in the Linux kernel ALSA Line6 driver's submit_audio_out_urb() function when preparing playback packets whose calculated sizes exceed the allocated output buffer capacity. An attacker with physical access to system can connect a specially crafted USB device declaring a large input endpoint packet size and a small output endpoint packet size to cause playback data copies or idle-stream memory initialization to write beyond the allocated buffer and corrupt kernel memory.


Remediation

Install update from vendor's website.

References