VDB-354820 · CVE-2026-34956 · GCVE-0-2026-34956

Open vSwitch up to 3.3.8/3.4.5/3.5.3/3.6.2/3.7.0 FTP alg memory corruption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.0	$0-$5k	2.04

Summaryinfo

A vulnerability was found in Open vSwitch up to 3.3.8/3.4.5/3.5.3/3.6.2/3.7.0 and classified as critical. This issue affects some unknown processing of the component FTP alg Handler. Executing a manipulation can lead to memory corruption. This vulnerability is registered as CVE-2026-34956. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Open vSwitch up to 3.3.8/3.4.5/3.5.3/3.6.2/3.7.0 and classified as critical. This vulnerability affects an unknown code of the component FTP alg Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared for download at seclists.org. This vulnerability was named CVE-2026-34956. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available.

Upgrading to version 3.3.9, 3.4.6, 3.5.4, 3.6.3 or 3.7.1 eliminates this vulnerability. The upgrade is hosted for download at mail.openvswitch.org.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Open vSwitch

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Open vSwitch 3.3.9/3.4.6/3.5.4/3.6.3/3.7.1

Timelineinfo

04/02/2026 Advisory disclosed
04/02/2026 +0 days VulDB entry created
04/02/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: seclists.org
Status: Confirmed

CVE: CVE-2026-34956 (🔒)
GCVE (CVE): GCVE-0-2026-34956
GCVE (VulDB): GCVE-100-354820

Entryinfo

Created: 04/02/2026 02:48
Changes: 04/02/2026 02:48 (52)
Complete: 🔍
Cache ID: 216:9B4:103