CVE-2026-35092
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Corosync
PublishedApr 1, 2026
First seenApr 1, 2026
Weakness typeCWE-190Integer overflow
How to fix
Vendor advisories
- access.redhat.com/errata/RHSA-2026:13644
- access.redhat.com/errata/RHSA-2026:13657
- access.redhat.com/errata/RHSA-2026:13673
- access.redhat.com/errata/RHSA-2026:14205
- access.redhat.com/errata/RHSA-2026:14210
- access.redhat.com/errata/RHSA-2026:14211
- access.redhat.com/errata/RHSA-2026:14212
- access.redhat.com/errata/RHSA-2026:14213
- access.redhat.com/errata/RHSA-2026:14214
- access.redhat.com/errata/RHSA-2026:14215
- access.redhat.com/errata/RHSA-2026:14216
- access.redhat.com/errata/RHSA-2026:19043
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| corosync corosync | No range specified | — |
| redhat openshift | 4.0 | — |
| redhat enterprise_linux | 7.0, 8.0, 9.0, 10.0 | — |
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