SB20260727237 - Improper Check or Handling of Exceptional Conditions in Linux kernel usb serial driver

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Main Vulnerability Database SB20260727237

SB20260727237 - Improper Check or Handling of Exceptional Conditions in Linux kernel usb serial driver

Published: July 27, 2026

Security Bulletin ID SB20260727237
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) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-64334)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

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 improper error handling in the digi_acceleport USB serial driver when sending out-of-band commands during operations that race with device disconnect. A local user can trigger operations such as open, set_termios, or close while the device is being disconnected to cause a denial of service.

The issue can result in an indefinite loop with interrupts disabled, leading to a hard lockup.


Remediation

Install update from vendor's website.

References