DEBIAN-CVE-2026-34956

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Source
https://security-tracker.debian.org/tracker/CVE-2026-34956
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34956.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-34956
Upstream
  • CVE-2026-34956
Published
2026-05-05T16:16:11Z
Modified
2026-09-14T17:03:08Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:12 / openvswitch

Package

Name
openvswitch
Purl
pkg:deb/debian/openvswitch?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.0-2
3.1.0-2+deb12u1
3.1.2-1
3.1.2-2
3.1.2-3
3.1.2-4
3.2.0-1
3.2.0-2
3.2.2~git20231029-1
3.2.2~git20231029-2
3.3.0~git20240118.e802fe7-1
3.3.0~git20240118.e802fe7-2
3.3.0~git20240118.e802fe7-3
3.3.0-1
3.3.0-2
3.3.0-3
3.3.0-4
3.3.0-5
3.3.1-1
3.4.0-1
3.5.0~git20241129.2af7cef-1
3.5.0~git20241129.2af7cef-2
3.5.0-1
3.6.0-1
3.6.0-2
3.6.0-3
3.6.0-5
3.6.0-6
3.6.0-7
3.7.0~git20260211.8c6ebf8-1~1.gbp9127d1
3.7.0~git20260211.8c6ebf8-1~1.gbp9127d2
3.7.0~git20260211.8c6ebf8-1~1.gbp9127d3
3.7.0-1
3.7.1-1
3.7.1-2
3.7.1-3
4.*
4.0.0-1
4.0.0-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34956.json"

Debian:13 / openvswitch

Package

Name
openvswitch
Purl
pkg:deb/debian/openvswitch?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.5.0-1
3.6.0-1
3.6.0-2
3.6.0-3
3.6.0-5
3.6.0-6
3.6.0-7
3.7.0~git20260211.8c6ebf8-1~1.gbp9127d1
3.7.0~git20260211.8c6ebf8-1~1.gbp9127d2
3.7.0~git20260211.8c6ebf8-1~1.gbp9127d3
3.7.0-1
3.7.1-1
3.7.1-2
3.7.1-3
4.*
4.0.0-1
4.0.0-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34956.json"

Debian:14 / openvswitch

Package

Name
openvswitch
Purl
pkg:deb/debian/openvswitch?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.7.1-1

Affected versions

3.*
3.5.0-1
3.6.0-1
3.6.0-2
3.6.0-3
3.6.0-5
3.6.0-6
3.6.0-7
3.7.0~git20260211.8c6ebf8-1~1.gbp9127d1
3.7.0~git20260211.8c6ebf8-1~1.gbp9127d2
3.7.0~git20260211.8c6ebf8-1~1.gbp9127d3
3.7.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34956.json"