VULNERABILITY INTELLIGENCE
CVE-2026-34956
CVSS score5.9 MEDIUM
EPSS probability0.40%
CISA KEVNot currently listed
Published2026-05-05
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
Weakness classification
- secalert@redhat.com: CWE-120