Vulnerability Details 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 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. This vulnerability affects Corosync when running in totemudp/totemudpu mode, which is the default configuration.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 28.2%
CVSS Severity
CVSS v3 Score 8.2
References
Products affected by CVE-2026-35091
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cpe:2.3:a:corosync:corosync:-
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cpe:2.3:a:redhat:openshift:4.0
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cpe:2.3:o:redhat:enterprise_linux:10.0
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cpe:2.3:o:redhat:enterprise_linux:7.0
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cpe:2.3:o:redhat:enterprise_linux:8.0
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cpe:2.3:o:redhat:enterprise_linux:9.0