Debian dla-4608 : corosync - security update

high Nessus Plugin ID 318003

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4608 advisory.

------------------------------------------------------------------------- Debian LTS Advisory DLA-4608-1 [email protected] https://www.debian.org/lts/security/ Emmanuel Arias May 30, 2026 https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package : corosync Version : 3.1.2-2+deb11u2 CVE ID : CVE-2026-35091 CVE-2026-35092 Debian Bug : 1133837 1133838

Two vulnerabilities have been found in corosync, a cluster engine daemon and utilities, that allow a remote, unauthenticated attacker to cause a denial of service.

CVE-2026-35091

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.

CVE-2026-35092

An integer overflow vulnerability in Corosync's join message sanity validation allows a remote, unauthenticated attacker to send crafted User Datagram Protocol (UDP) packets. This can cause the service to crash, leading to a denial of service.

For Debian 11 bullseye, these problems have been fixed in version 3.1.2-2+deb11u2.

We recommend that you upgrade your corosync packages.

For the detailed security status of corosync please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/corosync

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
signature.asc Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian 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

Upgrade the corosync packages.

Plugin Details

Severity: High

ID: 318003

File Name: debian_DLA-4608.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 5/30/2026

Updated: 5/30/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.7

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

CVSS Score Source: CVE-2026-35091

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.4

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:libcorosync-common4, p-cpe:/a:debian:debian_linux:corosync-doc, p-cpe:/a:debian:debian_linux:libvotequorum-dev, p-cpe:/a:debian:debian_linux:libcfg7, p-cpe:/a:debian:debian_linux:libcorosync-common-dev, p-cpe:/a:debian:debian_linux:libcmap-dev, p-cpe:/a:debian:debian_linux:corosync-notifyd, p-cpe:/a:debian:debian_linux:libcmap4, p-cpe:/a:debian:debian_linux:libquorum-dev, p-cpe:/a:debian:debian_linux:libquorum5, p-cpe:/a:debian:debian_linux:libcfg-dev, p-cpe:/a:debian:debian_linux:libcpg-dev, p-cpe:/a:debian:debian_linux:corosync-vqsim, p-cpe:/a:debian:debian_linux:libvotequorum8, p-cpe:/a:debian:debian_linux:corosync, p-cpe:/a:debian:debian_linux:libsam4, p-cpe:/a:debian:debian_linux:libsam-dev, p-cpe:/a:debian:debian_linux:libcpg4

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/30/2026

Vulnerability Publication Date: 1/8/2026

Reference Information

CVE: CVE-2026-35091, CVE-2026-35092

IAVA: 2026-A-0004

Detections

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