Description

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.

INFO

Published Date :

2026-05-05T15:45:04.638Z

Last Modified :

2026-05-06T14:17:37.582Z

Source :

redhat
AFFECTED PRODUCTS

The following products are affected by CVE-2026-34956 vulnerability.

Vendors Products
Redhat
  • Enterprise Linux
  • Fast Datapath
  • Openshift
  • Openshift Container Platform
  • Openstack
  • Openstack Platform
  • Openvswitch
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-34956.

URL Resource
http://www.openwall.com/lists/oss-security/2026/03/31/15 cve-icon
https://access.redhat.com/security/cve/CVE-2026-34956 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2453459 cve-icon cve-icon
Login to claim this CVE

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact