VDB-372774 · CVE-2026-56109 · GCVE-0-2026-56109

alsa-project alsa-lib prior 1.2.16.1 src/conf.c parse_def double free

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.5	$0-$5k	3.31

Summaryinfo

A vulnerability labeled as problematic has been found in alsa-project alsa-lib. The affected element is the function parse_def of the file src/conf.c. The manipulation results in double free. This vulnerability is cataloged as CVE-2026-56109. The attack must be initiated from a local position. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in alsa-project alsa-lib. Affected is the function parse_def of the file src/conf.c. The manipulation with an unknown input leads to a double free vulnerability. CWE is classifying the issue as CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. This is going to have an impact on integrity, and availability. CVE summarizes:

The Advanced Linux Sound Architecture (ALSA) library before 1.2.16.1 contains a double-free vulnerability in parse_def() in src/conf.c that allows attackers to corrupt memory by supplying maliciously crafted ALSA configuration text. When parsing nested compound or array configuration blocks, parse_def() fails to check return values before continuing, causing snd_config_delete() to be called twice on the same already-freed node, resulting in a NULL-pointer write or invalid memory read.

The weakness was shared by Dmitrijs Trizna. The advisory is available at lore.kernel.org. This vulnerability is traded as CVE-2026-56109 since 06/18/2026. The exploitability is told to be easy. Local access is required to approach this attack. Technical details are known, but there is no available exploit.

Upgrading to version 1.2.16.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 536dd6f8affdf5197c12a63a71c92a70b2833cc0 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

Project Management Software

Vendor

alsa-project

Name

alsa-lib

License

open-source

Website

Product: https://github.com/alsa-project/alsa-lib/

CPE 2.3info

🔒

CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.8
CNA Vector (VulnCheck): 🔒

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: alsa-lib 1.2.16.1
Patch: 536dd6f8affdf5197c12a63a71c92a70b2833cc0

Timelineinfo

06/18/2026 CVE reserved
06/22/2026 +4 days Advisory disclosed
06/22/2026 +0 days VulDB entry created
06/22/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: lore.kernel.org
Researcher: Dmitrijs Trizna
Status: Confirmed

CVE: CVE-2026-56109 (🔒)
GCVE (CVE): GCVE-0-2026-56109
GCVE (VulDB): GCVE-100-372774

Entryinfo

Created: 06/22/2026 21:07
Changes: 06/22/2026 21:07 (80)
Complete: 🔍
Cache ID: 216::103