EUVD-2026-17881

| CVE-2026-35092 HIGH
2026-04-01 redhat GHSA-g4g9-h6f9-v5x2
7.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
Patch Released
Apr 01, 2026 - 20:30 nvd
Patch available
Analysis Generated
Apr 01, 2026 - 13:30 vuln.today
EUVD ID Assigned
Apr 01, 2026 - 13:30 euvd
EUVD-2026-17881
CVE Published
Apr 01, 2026 - 13:18 nvd
HIGH 7.5

Tags

Denial Of Service Integer Overflow

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.

Analysis

Remote denial of service via integer overflow in Corosync cluster engine affects Red Hat Enterprise Linux 7-10 and OpenShift Container Platform 4. Unauthenticated attackers can send crafted UDP packets to crash Corosync services running in totemudp/totemudpu mode (CVSS 7.5, AV:N/PR:N). …

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Remediation

Within 24 hours: identify all systems running Corosync in totemudp/totemudpu mode using network discovery and configuration audits; document current cluster dependencies and failover capabilities. Within 7 days: implement network-level UDP packet filtering to restrict Corosync UDP ports (default 5404-5406) to trusted cluster nodes only; enable detailed logging on Corosync services to detect exploitation attempts. …

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Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +38
POC: 0

Vendor Status

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EUVD-2026-17881 vulnerability details – vuln.today
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