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HIGH · 8.2

CVE-2026-35091

A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User ...

Vulnerability Description

A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User Datagram Protocol (UDP) packet. This can lead to an out-of-bounds read, causing a denial of service (DoS) and potentially disclosing limited memory contents

CVSS Score

8.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
CorosyncCorosync-
RedhatOpenshift4.0
RedhatEnterprise Linux7.0

Related Weaknesses (CWE)

CWE-253

References

FAQ

What is CVE-2026-35091?

CVE-2026-35091 is a vulnerability with a CVSS score of 8.2 (HIGH). A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User ...

How severe is CVE-2026-35091?

CVE-2026-35091 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-35091?

Check the references section above for vendor advisories and patch information. Affected products include: Corosync Corosync, Redhat Openshift, Redhat Enterprise Linux.