5.9
Medium
CVE-2026-34956 Openvswitch: open vswitch: denial of service via malformed ftp epasv command
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.
CVSS 3.1 detail
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HExploitable remotely over the network, without an account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- Interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Fast Datapath for RHEL 7 | Versions not published | |
| Fast Datapath for RHEL 8 | Versions not published | |
| Fast Datapath for RHEL 9 | Versions not published | |
| Red Hat Enterprise Linux 7 | Versions not published | |
| Red Hat OpenShift Container Platform 4 | Versions not published | |
| Red Hat OpenStack Platform 13 (Queens) | Versions not published | |
| Red Hat OpenStack Platform 16.2 | Versions not published | |
| Red Hat OpenStack Platform 17.1 | Versions not published | |
| Red Hat OpenStack Platform 18.0 | Versions not published |
References
- access.redhat.com access.redhat.com
- RHBZ#2453459 bugzilla.redhat.com
Timeline
- Published
- Last modified
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