Linux Distros Unpatched Vulnerability : CVE-2026-35091

critical Nessus Plugin ID 304623

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 Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User Datagram Protocol (UDP) packet. This can lead to an out-of-bounds read, causing a denial of service (DoS) and potentially disclosing limited memory contents. This vulnerability affects Corosync when running in totemudp/totemudpu mode, which is the default configuration. (CVE-2026-35091)

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

Solution

There is no known solution at this time.

Plugin Details

Severity: Critical

ID: 304623

File Name: unpatched_CVE_2026_35091.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Misc.

Published: 4/2/2026

Updated: 4/2/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5.4

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

CVSS Score Source: CVE-2026-35091

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.3

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

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

Vulnerability Information

CPE: p-cpe:/a:centos:centos:corosync-qdevice, p-cpe:/a:redhat:enterprise_linux:corosynclib, p-cpe:/a:redhat:enterprise_linux:spausedd, cpe:/o:redhat:enterprise_linux:9, cpe:/o:centos:centos:8, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:corosynclib-devel, p-cpe:/a:redhat:enterprise_linux:corosync, p-cpe:/a:redhat:enterprise_linux:corosync-qnetd, p-cpe:/a:centos:centos:corosync-qnetd, p-cpe:/a:redhat:enterprise_linux:corosync-qdevice, p-cpe:/a:centos:centos:corosynclib-devel, cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:spausedd, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:centos:centos:corosync-vqsim, p-cpe:/a:centos:centos:corosync, p-cpe:/a:redhat:enterprise_linux:corosync-vqsim, p-cpe:/a:centos:centos:corosynclib

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 4/1/2026

Reference Information

CVE: CVE-2026-35091

Detections

Analytics