CVE-2026-35092

⚠️ high

Summary

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.

CVSS Score

7.5

High

EPSS Score

1.0

Exploit Probability

Published Date

2026-04-01

First Seen: 2026-04-08

📊 Relative Risk Intelligence

This CVE is Moderate Risk - more severe than 69.1% of all 318,071 vulnerabilities in our database.

#98,337

Above average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Apr 1, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

YES

Can be exploited automatically

💥 Technical Impact

Partial

Limited system impact

🏆 Discovered By

Red Hat would like to thank Sebastián Alba Vives for reporting this issue.

SSVC data provided by CISA

Last Modified 2026-04-07

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-190

📦 Affected Products 6

Vendor	Product	Status	Affected Versions
redhat	enterprise_linux	Affected	v10.0
redhat	enterprise_linux	Affected	v7.0
redhat	enterprise_linux	Affected	v8.0
redhat	enterprise_linux	Affected	v9.0
redhat	openshift	Affected	v4.0
corosync	corosync	Affected	v-

🔗 References 3

https://access.redhat.com/security/cve/CVE-2026-35092

Third Party Advisory VDB Entry

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

Exploit Third Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2453814

Issue Tracking Third Party Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-4878	🔶 medium	6.7	0.0	A flaw was found in libcap. A local unprivileged user can exploit a Time-of-check-to-time-of-use (TOCTOU) race condition...	2026-04-09
CVE-2026-35091	⚠️ high	8.2	0.3	A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Co...	2026-04-01
CVE-2026-5121	⚠️ high	7.5	0.1	A flaw was found in libarchive. On 32-bit systems, an integer overflow vulnerability exists in the zisofs block pointer ...	2026-03-30
CVE-2026-28368	⚠️ high	8.7	0.1	A flaw was found in Undertow. This vulnerability allows a remote attacker to construct specially crafted requests where ...	2026-03-27
CVE-2026-28369	⚠️ high	8.7	0.1	A flaw was found in Undertow. When Undertow receives an HTTP request where the first header line starts with one or more...	2026-03-27
CVE-2026-4897	🔶 medium	5.5	0.0	A flaw was found in polkit. A local user can exploit this by providing a specially crafted, excessively long input to th...	2026-03-26

These CVEs affect the same products