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SUSE openvswitch3 Important Heap Overflow Vuln 2026-2476-1

suse
Calendar Grey June 22, 2026
Dist Suse Esm H88
Critical security advisory addressing important vulnerabilities in openvswitch3 for SUSE systems, impacting functionality.
An update that solves two vulnerabilities can now be installed.

Summary

## This update for openvswitch3 fixes the following issues * CVE-2026-5265: heap over-read in ICMP error response generation (bsc#1262498). * CVE-2026-5367: heap over-read in OVN DHCPv6 client ID processing (bsc#1262499). ## 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 15 SP5 LTSS zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-2476=1 * SUSE Linux Enterprise Micro 5.5 zypper in -t patch SUSE-SLE-Micro-5.5-2026-2476=1 * openSUSE Leap 15.5 zypper in -t patch SUSE-2026-2476=1 * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-2476=1

Topics%20covered

Topics Covered

security advisory DoS important heap overflow OpenSUSE openvswitch3

References

* bsc#1262498

* bsc#1262499

Cross-

* CVE-2026-5265

* CVE-2026-5367

CVSS scores:

* CVE-2026-5265 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

* CVE-2026-5265 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H

* CVE-2026-5367 ( SUSE ): 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

* CVE-2026-5367 ( NVD ): 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Affected Products:

* openSUSE Leap 15.5

* SUSE Linux Enterprise High Performance Computing 15 SP5

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5

* SUSE Linux Enterprise Micro 5.5

* SUSE Linux Enterprise Server 15 SP5

* SUSE Linux Enterprise Server 15 SP5 LTSS

* SUSE Linux Enterprise Server for SAP Applications 15 SP5

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2476-1
Release Date: 2026-06-22T08:24:24Z
Rating: important

Topics%20covered

Topics Covered

security advisory DoS important heap overflow OpenSUSE openvswitch3

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