Detections
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Ubuntu 22.04 LTS / 24.04 LTS / 25.10 : Corosync vulnerabilities (USN-8170-1)

high Nessus Plugin ID 306304

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8170-1 advisory.

 It was discovered that Corosync incorrectly handled the membership commit token validity check. A remote attacker could use this issue to cause Corosync to crash, resulting in a denial of service, or to possibly obtain a small quantity of sensitive information. (CVE-2026-35091)

 It was discovered that Corosync incorrectly handled join message validation. A remote attacker could possibly use this issue to cause Corosync to crash, resulting in a denial of service. (CVE-2026-35092)

Tenable has extracted the preceding description block directly from the Ubuntu 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

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-8170-1

Plugin Details

Severity: High

ID: 306304

File Name: ubuntu_USN-8170-1.nasl

Version: 1.2

Type: Local

Agent: unix

Published: 4/14/2026

Updated: 4/14/2026

Supported Sensors: Agentless Assessment, Continuous 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: Low

Score: 3.5

Percentile: 51.77

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:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libcfg7, p-cpe:/a:canonical:ubuntu_linux:libcorosync-common-dev, p-cpe:/a:canonical:ubuntu_linux:libcmap4, p-cpe:/a:canonical:ubuntu_linux:libsam-dev, cpe:/o:canonical:ubuntu_linux:25.10, p-cpe:/a:canonical:ubuntu_linux:libcpg-dev, p-cpe:/a:canonical:ubuntu_linux:libsam4, p-cpe:/a:canonical:ubuntu_linux:corosync-notifyd, p-cpe:/a:canonical:ubuntu_linux:libcorosync-common4, p-cpe:/a:canonical:ubuntu_linux:libvotequorum8, p-cpe:/a:canonical:ubuntu_linux:libquorum5, p-cpe:/a:canonical:ubuntu_linux:libvotequorum-dev, p-cpe:/a:canonical:ubuntu_linux:libcmap-dev, p-cpe:/a:canonical:ubuntu_linux:libquorum-dev, p-cpe:/a:canonical:ubuntu_linux:libcpg4, p-cpe:/a:canonical:ubuntu_linux:corosync-vqsim, p-cpe:/a:canonical:ubuntu_linux:libcfg-dev, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:corosync

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/13/2026

Vulnerability Publication Date: 4/1/2026

Reference Information

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

USN: 8170-1