CVE-2026-35092 HIGH

CVE-2026-35092: Corosync: corosync: denial of service via integer overflow in join message validation

Vendor Red Hat
Product Red Hat OpenShift Container Platform 4
Weakness CWE-190
Published April 1, 2026
Last update May 29, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

A flaw was found in Corosync. 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. This vulnerability specifically affects Corosync deployments configured to use totemudp/totemudpu mode.

Key dates

02Disclosure timeline

April 1, 2026 CVE published
May 29, 2026 Record updated