CVE-2026-35092

HIGH

Corosync: corosync: denial of service via integer overflow in join message validation

Title source: cna

Description

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.

References (3)

[Vdb Entry, X_Refsource_Redhat] https://access.redhat.com/security/cve/CVE-2026-35092

[Issue Tracking, X_Refsource_Redhat] https://bugzilla.redhat.com/show_bug.cgi?id=2453814

https://bugzilla.redhat.com/show_bug.cgi?id=2453169

Scores

CVSS v3 7.5

EPSS 0.0021

EPSS Percentile 43.1%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-190

Status published

Products (11)

corosync/corosync

Red Hat/Red Hat Enterprise Linux 10

Red Hat/Red Hat Enterprise Linux 7

Red Hat/Red Hat Enterprise Linux 8

Red Hat/Red Hat Enterprise Linux 9

Red Hat/Red Hat OpenShift Container Platform 4

redhat/enterprise_linux 7.0

redhat/enterprise_linux 8.0

redhat/enterprise_linux 9.0

redhat/enterprise_linux 10.0

... and 1 more

Published Apr 01, 2026

Tracked Since Apr 01, 2026