CVE-2025-21689
kernel: USB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb()
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · February 10, 2025
Updated · October 29, 2026
Description
A flaw was found in the quatech2 module in the Linux kernel. An incorrect check for invalid port numbers can cause a NULL pointer dereference and result in a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference