SUSE 2026 Corosync Essential Denial of Service Resolution 2026-21285-2
suse
April 27, 2026
An update that solves two vulnerabilities can now be installed.
Summary
## 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
Topics Covered
References
* bsc#1261299
* bsc#1261300
Cross-
* 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.
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Severity
important
Lowest
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Critical
Announcement ID: SUSE-SU-2026:21285-1
Release Date: 2026-04-10T11:20:26Z
Rating: important
Topics Covered
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