Detections
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Amazon Linux 2023 : libssh, libssh-config, libssh-devel (ALAS2023-2026-1461)
medium Nessus Plugin ID 301351
Synopsis
The remote Amazon Linux 2023 host is missing a security update.Description
It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1461 advisory.libssh: Buffer underflow in ssh_get_hexa() on invalid input (CVE-2026-0966)
Tenable has extracted the preceding description block directly from the tested product security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Run 'dnf update libssh --releasever 2023.10.20260302' or or 'dnf update --advisory ALAS2023-2026-1461 --releasever 2023.10.20260302' to update your system.See Also
https://alas.aws.amazon.com/faqs.html
Plugin Details
Severity: Medium
ID: 301351
File Name: al2023_ALAS2023-2026-1461.nasl
Version: 1.1
Type: local
Agent: unix
Published: 3/6/2026
Updated: 3/6/2026
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.4
CVSS v2
Risk Factor: Medium
Base Score: 6.4
Temporal Score: 4.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P
CVSS Score Source: CVE-2026-0966
CVSS v3
Risk Factor: Medium
Base Score: 6.5
Temporal Score: 5.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:libssh-config, p-cpe:/a:amazon:linux:libssh-devel, p-cpe:/a:amazon:linux:libssh-debuginfo, p-cpe:/a:amazon:linux:libssh-debugsource, p-cpe:/a:amazon:linux:libssh, cpe:/o:amazon:linux:2023
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 3/5/2026
Vulnerability Publication Date: 2/19/2026
Reference Information
CVE: CVE-2026-0966
IAVA: 2026-A-0166