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SUSE Openvswitch Important Buffer Overflow Heap Over-Read Vuln 2026-22152-1

suse
Calendar Grey June 23, 2026
Dist Suse Esm H88
Update for SUSE addresses three issues in Open vSwitch, including buffer overflows and memory access problems. Take action.
An update that solves three vulnerabilities can now be installed.

Summary

## This update for openvswitch 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). * CVE-2026-34956: Invalid memory access in conntrack FTP alg (bsc#1261273). Changes for openvswitch: * Update ovn to 25.03.3 * Bug fixes * Add support for special port_security prefix "VRRPv3". This prefix allows CMS to allow all required traffic for a VRRPv3 virtual router behind LSP. See ovn-nb(5) man page for more details. * Fixed support for fragmented traffic in the userspace datapath. Added the "acl_ct_translation" NB_Global option to enable connection tracking based L4 field translation for stateful ACLs. When enabled allows proper handling of

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow important heap over-read openvswitch

References

* bsc#1261273

* bsc#1262498

* bsc#1262499

Cross-

* CVE-2026-34956

* CVE-2026-5265

* CVE-2026-5367

CVSS scores:

* CVE-2026-34956 ( SUSE ): 8.2

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

* CVE-2026-34956 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-34956 ( NVD ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

* 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:

* SUSE Linux Enterprise Server 16.0

* SUSE Linux Enterprise Server for SAP applications 16.0

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:22152-1
Release Date: 2026-06-17T08:37:36Z
Rating: important

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow important heap over-read openvswitch

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