Upstream information

CVE-2026-35092 at MITRE

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.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (Red Hat) SUSE
Base Score 7.5 7.5
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network Network
Attack Complexity Low Low
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact None None
Availability Impact High High
CVSSv3 Version 3.1 3.1
CVSS v4 Scores
CVSS detail SUSE
Base Score 8.7
Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Attack Vector Network
Attack Complexity Low
Attack Requirements None
Privileges Required None
User Interaction None
Vulnerable System Confidentiality Impact None
Vulnerable System Integrity Impact None
Vulnerable System Availability Impact High
Subsequent System Confidentiality Impact None
Subsequent System Integrity Impact None
Subsequent System Availability Impact None
CVSSv4 Version 4.0
SUSE Bugzilla entry: 1261300 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
Container suse/sl-micro/6.0/baremetal-os-container:2.1.3-6.101
Image SLE-Micro
Image SLE-Micro-Azure
Image SLE-Micro-BYOS
Image SLE-Micro-BYOS-Azure
Image SLE-Micro-BYOS-EC2
Image SLE-Micro-BYOS-GCE
Image SLE-Micro-EC2
Image SLE-Micro-GCE
  • openssh >= 9.6p1-4.1
  • openssh-clients >= 9.6p1-4.1
  • openssh-common >= 9.6p1-4.1
  • openssh-server >= 9.6p1-4.1
Image SLES-SAP-GCE-3P
  • corosync >= 3.1.9-160000.3.1
  • corosync-libs >= 3.1.9-160000.3.1
Image SLES15-SP7-SAP-GCE-3P
  • corosync >= 2.4.6-150300.12.16.1
  • corosync-qdevice >= 2.4.6-150300.12.16.1
  • libcfg6 >= 2.4.6-150300.12.16.1
  • libcmap4 >= 2.4.6-150300.12.16.1
  • libcorosync_common4 >= 2.4.6-150300.12.16.1
  • libcpg4 >= 2.4.6-150300.12.16.1
  • libquorum5 >= 2.4.6-150300.12.16.1
  • libsam4 >= 2.4.6-150300.12.16.1
  • libtotem_pg5 >= 2.4.6-150300.12.16.1
  • libvotequorum8 >= 2.4.6-150300.12.16.1
SUSE Linux Enterprise High Availability Extension 15 SP4
  • corosync >= 2.4.6-150300.12.16.1
  • corosync-qdevice >= 2.4.6-150300.12.16.1
  • corosync-qnetd >= 2.4.6-150300.12.16.1
  • corosync-testagents >= 2.4.6-150300.12.16.1
  • libcfg6 >= 2.4.6-150300.12.16.1
  • libcmap4 >= 2.4.6-150300.12.16.1
  • libcorosync-devel >= 2.4.6-150300.12.16.1
  • libcorosync_common4 >= 2.4.6-150300.12.16.1
  • libcpg4 >= 2.4.6-150300.12.16.1
  • libquorum5 >= 2.4.6-150300.12.16.1
  • libsam4 >= 2.4.6-150300.12.16.1
  • libtotem_pg5 >= 2.4.6-150300.12.16.1
  • libvotequorum8 >= 2.4.6-150300.12.16.1
 Patchnames:
SUSE-SLE-Product-HA-15-SP4-2026-1394
SUSE Linux Enterprise High Availability Extension 15 SP5
  • corosync >= 2.4.6-150300.12.16.1
  • corosync-qdevice >= 2.4.6-150300.12.16.1
  • corosync-qnetd >= 2.4.6-150300.12.16.1
  • corosync-testagents >= 2.4.6-150300.12.16.1
  • libcfg6 >= 2.4.6-150300.12.16.1
  • libcmap4 >= 2.4.6-150300.12.16.1
  • libcorosync-devel >= 2.4.6-150300.12.16.1
  • libcorosync_common4 >= 2.4.6-150300.12.16.1
  • libcpg4 >= 2.4.6-150300.12.16.1
  • libquorum5 >= 2.4.6-150300.12.16.1
  • libsam4 >= 2.4.6-150300.12.16.1
  • libtotem_pg5 >= 2.4.6-150300.12.16.1
  • libvotequorum8 >= 2.4.6-150300.12.16.1
 Patchnames:
SUSE-SLE-Product-HA-15-SP5-2026-1394
SUSE Linux Enterprise High Availability Extension 15 SP6
  • corosync >= 2.4.6-150300.12.16.1
  • corosync-qdevice >= 2.4.6-150300.12.16.1
  • corosync-qnetd >= 2.4.6-150300.12.16.1
  • corosync-testagents >= 2.4.6-150300.12.16.1
  • libcfg6 >= 2.4.6-150300.12.16.1
  • libcmap4 >= 2.4.6-150300.12.16.1
  • libcorosync-devel >= 2.4.6-150300.12.16.1
  • libcorosync_common4 >= 2.4.6-150300.12.16.1
  • libcpg4 >= 2.4.6-150300.12.16.1
  • libquorum5 >= 2.4.6-150300.12.16.1
  • libsam4 >= 2.4.6-150300.12.16.1
  • libtotem_pg5 >= 2.4.6-150300.12.16.1
  • libvotequorum8 >= 2.4.6-150300.12.16.1
 Patchnames:
SUSE-SLE-Product-HA-15-SP6-2026-1394
SUSE Linux Enterprise High Availability Extension 15 SP7
  • corosync >= 2.4.6-150300.12.16.1
  • corosync-qdevice >= 2.4.6-150300.12.16.1
  • corosync-qnetd >= 2.4.6-150300.12.16.1
  • corosync-testagents >= 2.4.6-150300.12.16.1
  • libcfg6 >= 2.4.6-150300.12.16.1
  • libcmap4 >= 2.4.6-150300.12.16.1
  • libcorosync-devel >= 2.4.6-150300.12.16.1
  • libcorosync_common4 >= 2.4.6-150300.12.16.1
  • libcpg4 >= 2.4.6-150300.12.16.1
  • libquorum5 >= 2.4.6-150300.12.16.1
  • libsam4 >= 2.4.6-150300.12.16.1
  • libtotem_pg5 >= 2.4.6-150300.12.16.1
  • libvotequorum8 >= 2.4.6-150300.12.16.1
 Patchnames:
SUSE-SLE-Product-HA-15-SP7-2026-1394
SUSE Linux Enterprise High Availability Extension 16.0
  • corosync >= 3.1.9-160000.3.1
  • corosync-devel >= 3.1.9-160000.3.1
  • corosync-libs >= 3.1.9-160000.3.1
 Patchnames:
SUSE-SLES-HA-16.0-521
SUSE Linux Enterprise Server for SAP applications 16.0
  • corosync >= 3.1.9-160000.3.1
  • corosync-devel >= 3.1.9-160000.3.1
  • corosync-libs >= 3.1.9-160000.3.1
 Patchnames:
SUSE-SLES-16.0-521
openSUSE Leap 15.6
  • corosync >= 2.4.6-150300.12.16.1
  • corosync-qdevice >= 2.4.6-150300.12.16.1
  • corosync-qnetd >= 2.4.6-150300.12.16.1
  • corosync-testagents >= 2.4.6-150300.12.16.1
  • libcfg6 >= 2.4.6-150300.12.16.1
  • libcfg6-32bit >= 2.4.6-150300.12.16.1
  • libcmap4 >= 2.4.6-150300.12.16.1
  • libcmap4-32bit >= 2.4.6-150300.12.16.1
  • libcorosync-devel >= 2.4.6-150300.12.16.1
  • libcorosync_common4 >= 2.4.6-150300.12.16.1
  • libcorosync_common4-32bit >= 2.4.6-150300.12.16.1
  • libcpg4 >= 2.4.6-150300.12.16.1
  • libcpg4-32bit >= 2.4.6-150300.12.16.1
  • libquorum5 >= 2.4.6-150300.12.16.1
  • libquorum5-32bit >= 2.4.6-150300.12.16.1
  • libsam4 >= 2.4.6-150300.12.16.1
  • libsam4-32bit >= 2.4.6-150300.12.16.1
  • libtotem_pg5 >= 2.4.6-150300.12.16.1
  • libtotem_pg5-32bit >= 2.4.6-150300.12.16.1
  • libvotequorum8 >= 2.4.6-150300.12.16.1
  • libvotequorum8-32bit >= 2.4.6-150300.12.16.1
 Patchnames:
openSUSE-SLE-15.6-2026-1394
openSUSE Leap 16.0
  • corosync >= 3.1.9-160000.3.1
  • corosync-devel >= 3.1.9-160000.3.1
  • corosync-libs >= 3.1.9-160000.3.1
 Patchnames:
openSUSE-Leap-16.0-521

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise High Availability Extension 15 SP7 corosync Released
SUSE Linux Enterprise High Availability Extension 16.0 corosync Released
SUSE Linux Enterprise High Availability Extension 16.1 corosync Affected
SUSE Linux Enterprise Server for SAP applications 16.0 corosync Released
SUSE Linux Enterprise Server for SAP applications 16.1 corosync Affected
openSUSE Leap 15.6 corosync Released
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Availability Extension 12 SP5 corosync Not affected
SUSE Linux Enterprise High Availability Extension 15 SP4 corosync Released
SUSE Linux Enterprise High Availability Extension 15 SP5 corosync Released
SUSE Linux Enterprise Server 12 SP5 corosync Not affected
SUSE Linux Enterprise Server 12 SP5-LTSS corosync Not affected
SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security corosync Not affected
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 corosync Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP5 corosync Not affected
Products past their end of life and not receiving proactive updates anymore.
SUSE Linux Enterprise Desktop 12 SP3 corosync Not affected
SUSE Linux Enterprise Desktop 12 SP4 corosync Not affected
SUSE Linux Enterprise High Availability Extension 12 SP3 corosync Not affected
SUSE Linux Enterprise High Availability Extension 12 SP4 corosync Not affected
SUSE Linux Enterprise High Availability Extension 15 SP3 corosync Affected
SUSE Linux Enterprise High Availability Extension 15 SP6 corosync Released
SUSE Linux Enterprise Server 12 SP3 corosync Not affected
SUSE Linux Enterprise Server 12 SP4 corosync Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP3 corosync Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4 corosync Not affected
SUSE Linux Enterprise Software Development Kit 12 SP3 corosync Not affected
SUSE Linux Enterprise Software Development Kit 12 SP4 corosync Not affected
SUSE Linux Enterprise Software Development Kit 12 SP5 corosync Not affected
openSUSE Leap 15.3 corosync Released
openSUSE Leap 15.4 corosync Affected
openSUSE Leap 15.5 corosync Affected

SUSE Timeline for this CVE

CVE page created: Wed Apr 1 14:00:23 2026
CVE page last modified: Wed Apr 22 17:55:21 2026