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CVE-2026-35092

Corosync: corosync: denial of service via integer overflow in join message validation

Published: Apr 1, 2026Updated: May 26, 2026 Sources: CVE List NVDCWE-190
NVD MITRE
7.5CVSSHIGH
EPSS Score
1.0%
Top 41.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-190

Affected Products

Red Hat Enterprise Linux 10Red Hat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 8Red Hat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat
On-premOS
Operating Systems / linux-distro
red hatcommercialUSOperating Systemsaka red hat
and 15 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Workaround Available

MITRE ATT&CK

1 technique
Initial Access
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References

https://access.redhat.com/errata/RHSA-2026:13644
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:13657
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:13673
access.redhat.com
and 14 more references View all →

Timeline

Published
Apr 1, 2026
Last Updated
May 26, 2026

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