Integer Overflow Vulnerability in Corosync Affects Service Stability
CVE-2026-35092

7.5HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Vendor
CVE Published:
1 April 2026

What is CVE-2026-35092?

A flaw discovered in Corosync reveals an integer overflow vulnerability within its join message sanity validation process. This issue allows a remote, unauthorized attacker to send specially crafted User Datagram Protocol (UDP) packets, which may lead to unexpected service crashes. Specifically, this affects instances of Corosync that are configured to operate in totemudp/totemudpu mode, resulting in potential denial of service conditions.

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References

https://access.redhat.com/security/cve/CVE-2026-35092
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2453169
https://bugzilla.redhat.com/show_bug.cgi?id=2453814
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

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