Detections
Analytics
Amazon Linux 2 : alsa-lib (ALAS-2026-4041)
medium Nessus Plugin ID 371791
Synopsis
The remote Amazon Linux 2 host is missing a security update.Description
The version of alsa-lib installed on the remote host is prior to 1.1.4.1-2. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-4041 advisory.alsa-lib through 1.2.16.1 contains a stack buffer overflow in the __snd_ctl_ascii_elem_id_parse() function that writes one byte past a 64-byte buffer when parsing a name= field with 64 or more characters.
Attackers can supply a long control-element identifier string through saved state files or command-line arguments to overwrite adjacent stack memory and crash the calling process. (CVE-2026-90781)
alsa-lib through 1.2.16.1 contains a denial of service vulnerability in the multi PCM plugin that fails to validate sparse binding indices before array access. Attackers can supply a malicious ALSA configuration file with sparse bindings to trigger an out-of-bounds array read and assertion failure, causing the application to abort. (CVE-2026-96675)
Tenable has extracted the preceding description block directly from the tested product security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Run 'yum update alsa-lib' or or 'yum update --advisory ALAS2-2026-4041' to update your system.See Also
https://alas.aws.amazon.com//AL2/ALAS2-2026-4041.html
https://alas.aws.amazon.com/faqs.html
Plugin Details
Severity: Medium
ID: 371791
File Name: al2_ALAS-2026-4041.nasl
Version: 1.1
Type: Local
Agent: unix
Published: 10/24/2026
Updated: 10/24/2026
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.1
Percentile: 53.47
CVSS v2
Risk Factor: Low
Base Score: 3.2
Temporal Score: 2.4
Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:P/A:P
CVSS Score Source: CVE-2026-90781
CVSS v3
Risk Factor: Medium
Base Score: 4.4
Temporal Score: 3.9
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 4.8
Threat Score: 1.1
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS Score Source: CVE-2026-96675
Vulnerability Information
CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:alsa-lib-debuginfo, p-cpe:/a:amazon:linux:alsa-lib-devel, p-cpe:/a:amazon:linux:alsa-lib
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 10/24/2026
Vulnerability Publication Date: 9/13/2026
Reference Information
CVE: CVE-2026-90781, CVE-2026-96675