High 8.2Published Apr 1, 2026

CVE-2026-35091Corosync: corosync: denial of service and information disclosure via crafted udp packet

Updated under an hour ago (Oct 27, 2026, 10:40 AM ET)

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It affects Red Hat Enterprise Linux 10 and 8 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat Enterprise Linux 10

Exploited in the last 30 days

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: 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Weakness (CWE): CWE-253
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Modified
Record last updated: Aug 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	from 0:3.1.9-2.el10_1.1 not affected	CNA record
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus	from 0:3.1.9-1.el10_0.2 not affected	CNA record
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support redhat:rhel_aus	from 0:3.1.0-3.el8_4.2 not affected	CNA record
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support redhat:rhel_eus_long_life	from 0:3.1.0-3.el8_4.2 not affected	CNA record
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support redhat:rhel_e4s	from 0:3.1.5-2.el8_6.1 not affected	CNA record
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support redhat:rhel_tus	from 0:3.1.5-2.el8_6.1 not affected	CNA record
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support redhat:rhel_eus	from 0:3.1.8-1.el9_4.1 not affected	CNA record
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift	4	CNA record
corosync corosync corosync:corosync	all versions	NVD
redhat openshift redhat:openshift	4.0	NVD
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References

References

https://access.redhat.com/errata/RHSA-2026:13644	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:13657	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:13673	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:14205	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:14210	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:14211	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:14212	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:14213	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:14214	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:14215	vendor-advisory, x-refsource-redhat
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.