Detections
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Linux Distros Unpatched Vulnerability : CVE-2026-91149

high Nessus Plugin ID 348606

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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 Cockpit. An unauthenticated remote attacker can exploit this vulnerability by initiating and sustaining numerous simultaneous connections to the `cockpit-tls` service. This forces the service to create an unbounded number of detached threads, consuming system resources such as memory and file descriptors. The primary consequence is a denial of service (DoS), leading to degradation or complete unavailability of the Cockpit service for legitimate users. (CVE-2026-91149)

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-2026-91149

https://security-tracker.debian.org/tracker/CVE-2026-91149

Plugin Details

Severity: High

ID: 348606

File Name: unpatched_CVE_2026_91149.nasl

Version: 1.3

Type: Local

Agent: unix

Family: Misc.

Published: 9/21/2026

Updated: 9/22/2026

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.3

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.6

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

CVSS Score Source: CVE-2026-91149

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.9

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

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

Vulnerability Information

CPE: cpe:/o:centos:centos:7, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:cockpit-bridge, p-cpe:/a:centos:centos:cockpit-doc, p-cpe:/a:centos:centos:cockpit-machines-ovirt, p-cpe:/a:centos:centos:cockpit-packagekit, p-cpe:/a:centos:centos:cockpit-pcp, p-cpe:/a:centos:centos:cockpit-storaged, p-cpe:/a:centos:centos:cockpit-system, p-cpe:/a:centos:centos:cockpit-ws-selinux, p-cpe:/a:centos:centos:cockpit-ws, p-cpe:/a:centos:centos:cockpit, p-cpe:/a:debian:debian_linux:cockpit, p-cpe:/a:redhat:enterprise_linux:cockpit-bridge, p-cpe:/a:redhat:enterprise_linux:cockpit-doc, p-cpe:/a:redhat:enterprise_linux:cockpit-machines-ovirt, p-cpe:/a:redhat:enterprise_linux:cockpit-packagekit, p-cpe:/a:redhat:enterprise_linux:cockpit-pcp, p-cpe:/a:redhat:enterprise_linux:cockpit-storaged, p-cpe:/a:redhat:enterprise_linux:cockpit-system, p-cpe:/a:redhat:enterprise_linux:cockpit-ws-selinux, p-cpe:/a:redhat:enterprise_linux:cockpit-ws, p-cpe:/a:redhat:enterprise_linux:cockpit

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 9/18/2026

Reference Information

CVE: CVE-2026-91149