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 breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Affected products
- Corosync / Corosync
- RedHat / enterprise_linux7.0 – 7.0
- RedHat / enterprise_linux8.0 – 8.0
- RedHat / enterprise_linux9.0 – 9.0
- RedHat / enterprise_linux10.0 – 10.0
- RedHat / openshift4.0 – 4.0
References
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:13644
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:13657
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:13673
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:14205
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:14210
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:14211
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:14212
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:14213
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:14214
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:14215
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:14216
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:19043
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:19200
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:20916
- VENDOR_ADVISORYhttps://access.redhat.com/security/cve/CVE-2026-35091
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=2453169
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=2453813
Updated 16m ago · 8 sources