CVE-2026-34956
Last modified
CVE-2026-34956 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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. EPSS estimates a 0.40% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Fast Datapath for RHEL 7 | All versions |
| Red Hat | Fast Datapath for RHEL 8 | All versions |
| Red Hat | Fast Datapath for RHEL 9 | All versions |
| Red Hat | Red Hat Enterprise Linux 7 | All versions |
| Red Hat | Red Hat OpenShift Container Platform 4 | All versions |
| Red Hat | Red Hat OpenStack Platform 13 (Queens) | All versions |
| Red Hat | Red Hat OpenStack Platform 16.2 | All versions |
| Red Hat | Red Hat OpenStack Platform 17.1 | All versions |
| Red Hat | Red Hat OpenStack Platform 18.0 | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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Scan your code nowSource: NVD / NIST