CVE-2026-34956— OpenVSwitch 拒绝服务漏洞
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一、 漏洞 CVE-2026-34956 基础信息
漏洞信息
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Vulnerability Title
Openvswitch: open vswitch: denial of service via malformed ftp epasv command
来源: 美国国家漏洞数据库 NVD
Vulnerability 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.
来源: 美国国家漏洞数据库 NVD
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
来源: 美国国家漏洞数据库 NVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Red Hat | Fast Datapath for RHEL 7 | - | cpe:/o:redhat:enterprise_linux:7::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 7 | - | cpe:/o:redhat:enterprise_linux:7::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 7 | - | cpe:/o:redhat:enterprise_linux:7::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 7 | - | cpe:/o:redhat:enterprise_linux:7::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 7 | - | cpe:/o:redhat:enterprise_linux:7::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 7 | - | cpe:/o:redhat:enterprise_linux:7::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 7 | - | cpe:/o:redhat:enterprise_linux:7::fastdatapath | |
| 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 8 | - | cpe:/o:redhat:enterprise_linux:8::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 8 | - | cpe:/o:redhat:enterprise_linux:8::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 8 | - | cpe:/o:redhat:enterprise_linux:8::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 8 | - | cpe:/o:redhat:enterprise_linux:8::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 8 | - | cpe:/o:redhat:enterprise_linux:8::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 8 | - | cpe:/o:redhat:enterprise_linux:8::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 8 | - | cpe:/o:redhat:enterprise_linux:8::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 8 | - | cpe:/o:redhat:enterprise_linux:8::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 | Fast Datapath for RHEL 9 | - | cpe:/o:redhat:enterprise_linux:9::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 9 | - | cpe:/o:redhat:enterprise_linux:9::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 9 | - | cpe:/o:redhat:enterprise_linux:9::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 9 | - | cpe:/o:redhat:enterprise_linux:9::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 9 | - | cpe:/o:redhat:enterprise_linux:9::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 9 | - | cpe:/o:redhat:enterprise_linux:9::fastdatapath | |
| Red Hat | Fast Datapath for RHEL 9 | - | cpe:/o:redhat:enterprise_linux:9::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 OpenShift Container Platform 4 | - | cpe:/a:redhat:openshift:4 | |
| Red Hat | Red Hat OpenShift Container Platform 4 | - | cpe:/a:redhat:openshift:4 | |
| 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 13 (Queens) | - | cpe:/a:redhat:openstack:13 | |
| 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 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 17.1 | - | cpe:/a:redhat:openstack:17.1 | |
| Red Hat | Red Hat OpenStack Platform 18.0 | - | cpe:/a:redhat:openstack:18.0 |
二、漏洞 CVE-2026-34956 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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- 2453459 – (CVE-2026-34956) CVE-2026-34956 openvswitch: Open vSwitch: Denial of Service via malformed FTP EPASV commandissue-trackingx_refsource_REDHAT
- https://nvd.nist.gov/vuln/detail/CVE-2026-34956
IV. Related Vulnerabilities
V. Comments for CVE-2026-34956
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