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CVE-2026-53996: Missing Authorization in The NetBSD Foundation NetBSD

0
High
VulnerabilityCVE-2026-53996cvecve-2026-53996
Published: 08/12/2026 (08/12/2026, 12:42:33 UTC)
Source: CVE Database V5
Vendor/Project: The NetBSD Foundation
Product: NetBSD

Description

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 absence of an access check on /dev/hdaudioN device nodes. Attackers can repeatedly issue HDAUDIO_FGRP_SETCONFIG from one thread while keeping DMA and IRQs live from a second thread to trigger a use-after-free race condition in hdafg_detach() between stream_stop() and stream_disestablish(), where a latched DMA interrupt dereferences a freed callback pointer, resulting in outcomes ranging from audio-subsystem denial of service and kernel panic to potential local kernel privilege escalation.

CVSS v4.0

Score 7.3high

Attack Vector
Local
Attack Complexity
High
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vuln. Confidentiality
High
Vuln. Integrity
High
Vuln. Availability
High
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Technical Details

Data Version
5.2
Assigner Short Name
VulnCheck
Date Reserved
2026-06-11T16:07:13.001Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a7c6d8bbf8831d53991a9ee

Added to database: 08/12/2026, 12:56:43 UTC

Last updated: 08/12/2026, 12:56:43 UTC

Views: 1

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