What is CVE-2026-53996?

CVE-2026-53996 is a high-severity vulnerability in The Netbsd Foundation, classified under Missing Authorization. CVSS score: 7.0/10. Published 2026-08-12.

How severe is CVE-2026-53996?

High severity. CVSS v3 base score is 7.0 out of 10.

Auth bypass in The Netbsd Foundation

CVE-2026-53996

NetBSD's hdaudio(4) driver in sys/dev/hdaudio/hdaudio.c contains a missing access control vulnerability that allows unprivileged local attackers to invoke the HDAUDIO_FGRP_SETCONFIG ioctl without elevated permissions by exploiting the abse…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

The Netbsd Foundation — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-53996?: CVE-2026-53996 is a high-severity vulnerability in The Netbsd Foundation, classified under Missing Authorization. CVSS score: 7.0/10. Published 2026-08-12.
How severe is CVE-2026-53996?: High severity. CVSS v3 base score is 7.0 out of 10.