Detections
Analytics

Linux Distros Unpatched Vulnerability : CVE-2026-0966

high Nessus Plugin ID 298574

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server's logging verbosity is set to `SSH_LOG_PACKET (3)` or higher. Successful exploitation could lead to a self-Denial of Service of the per- connection daemon process. (CVE-2026-0966)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-0966

https://security-tracker.debian.org/tracker/CVE-2026-0966

Plugin Details

Severity: High

ID: 298574

File Name: unpatched_CVE_2026_0966.nasl

Version: 1.12

Type: Local

Agent: unix

Family: Misc.

Published: 2/10/2026

Updated: 5/19/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2026-0966

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:centos:centos:libssh-config, p-cpe:/a:debian:debian_linux:libssh, cpe:/o:centos:centos:8, p-cpe:/a:redhat:enterprise_linux:libssh-devel, p-cpe:/a:centos:centos:libssh, p-cpe:/a:redhat:enterprise_linux:libssh-config, p-cpe:/a:centos:centos:libssh-devel, p-cpe:/a:redhat:enterprise_linux:libssh, cpe:/o:debian:debian_linux:12.0, cpe:/o:redhat:enterprise_linux:8, cpe:/o:debian:debian_linux:13.0

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Reference Information

CVE: CVE-2026-0966

IAVA: 2026-A-0166