SUSE alert SUSE-SU-2026:21285-1 (corosync)

From:
             
 
SLE-SECURITY-UPDATES <null@suse.de>
To:
             
 
sle-security-updates@lists.suse.com
Subject:
             
 
SUSE-SU-2026:21285-1: important: Security update for corosync
Date:
             
 
Mon, 27 Apr 2026 08:35:52 -0000
Message-ID:
             
 
<177727895232.5974.1085272094673448679@d4c6dfb45de4>


# Security update for corosync

Announcement ID: SUSE-SU-2026:21285-1  
Release Date: 2026-04-10T11:20:26Z  
Rating: important  
References:

  * bsc#1261299
  * bsc#1261300

  
Cross-References:

  * CVE-2026-35091
  * CVE-2026-35092

  
CVSS scores:

  * CVE-2026-35091 ( SUSE ):  8.8
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-35091 ( SUSE ):  8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
  * CVE-2026-35091 ( NVD ):  8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
  * CVE-2026-35092 ( SUSE ):  8.7
    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
  * CVE-2026-35092 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-35092 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * SUSE Linux Enterprise Server High Availability Extension 16.0

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

This update for corosync fixes the following issues:

  * CVE-2026-35091: Denial of Service and information disclosure via crafted UDP
    packet (bsc#1261299).
  * CVE-2026-35092: Denial of Service via integer overflow in join message
    validation (bsc#1261300).

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Enterprise Server High Availability Extension 16.0  
    zypper in -t patch SUSE-SLES-HA-16.0-521=1

## Package List:

  * SUSE Linux Enterprise Server High Availability Extension 16.0 (ppc64le s390x
    x86_64)
    * corosync-devel-3.1.9-160000.3.1
    * corosync-debugsource-3.1.9-160000.3.1
    * corosync-libs-debuginfo-3.1.9-160000.3.1
    * corosync-3.1.9-160000.3.1
    * corosync-debuginfo-3.1.9-160000.3.1
    * corosync-libs-3.1.9-160000.3.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-35091.html
  * https://www.suse.com/security/cve/CVE-2026-35092.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1261299
  * https://bugzilla.suse.com/show_bug.cgi?id=1261300



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