Vulnerability-Lookup

SUSE-SU-2026:22068-1

Vulnerability from csaf_suse - Published: 2026-06-04 12:10 - Updated: 2026-09-16 19:55

Summary

Security update for openvswitch

Severity

Moderate

Notes

Title of the patch: Security update for openvswitch

Description of the patch: This update for openvswitch fixes the following issue - CVE-2026-34956: Invalid memory access in conntrack FTP alg (bsc#1261273).

Patchnames: SUSE-SLE-Micro-6.1-564

CVE-2026-34956

5.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Recommended 8 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_3.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_3.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_3.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_3.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_3.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_3.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_3.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_3.1.x86_64	—	Vendor Fix

Threats

Impact moderate

References

8 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-updates/2026…	self
https://bugzilla.suse.com/1261273	self
https://www.suse.com/security/cve/CVE-2026-34956/	self
https://www.suse.com/security/cve/CVE-2026-34956	external
https://bugzilla.suse.com/1261273	external

JSON

To clipboard

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          "title": "CVE description"
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    }
  ]
}

CVE-2026-34956 (GCVE-0-2026-34956)

Vulnerability from cvelistv5 – Published: 2026-05-05 15:45 – Updated: 2026-09-01 12:01

Title

Openvswitch: open vswitch: denial of service via malformed ftp epasv command

Summary

A flaw was found in Open vSwitch. When Open vSwitch is configured with a conntrack flow using FTP helpers over the userspace datapath, a remote attacker can send a specially crafted FTP stream with an EPASV command exceeding 255 characters. This heap access error can lead to a crash, resulting in a Denial of Service (DoS) for the affected system.

Severity

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-06 14:17 UTC

CWE

CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Assigner

redhat redhat root Scorecard

References

3 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-34956	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2453459	issue-trackingx_refsource_REDHAT
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

9 products

Vendor	Product	Version
Red Hat	Fast Datapath for RHEL 7	cpe:/o:redhat:enterprise_linux:7::fastdatapath
Red Hat	Fast Datapath for RHEL 8	cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat	Fast Datapath for RHEL 9	cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4
Red Hat	Red Hat OpenStack Platform 13 (Queens)	cpe:/a:redhat:openstack:13
Red Hat	Red Hat OpenStack Platform 16.2	cpe:/a:redhat:openstack:16.2
Red Hat	Red Hat OpenStack Platform 17.1	cpe:/a:redhat:openstack:17.1
Red Hat	Red Hat OpenStack Platform 18.0	cpe:/a:redhat:openstack:18.0

Date Public

2026-03-31 00:00

Credits

Red Hat would like to thank Seiji Sakurai for reporting this issue.

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Action not permitted

SUSE-SU-2026:22068-1

CVE-2026-34956 (GCVE-0-2026-34956)

Tags

Sightings

Nomenclature

Related by attack behaviour