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CVE-2026-35091

Corosync: corosync: denial of service and information disclosure via crafted udp packet

Published: Apr 1, 2026Updated: May 26, 2026 Sources: CVE List NVDCWE-253
NVD MITRE
8.2CVSSHIGH
EPSS Score
0.9%
Top 46.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI: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:LConfidentiality
Low
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-253

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 →

Exploitability

Workaround Available

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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