Bug 2453459 (CVE-2026-34956) - CVE-2026-34956 openvswitch: Open vSwitch: Denial of Service via malformed FTP EPASV command
Summary: CVE-2026-34956 openvswitch: Open vSwitch: Denial of Service via malformed FTP...
Keywords:
Status: NEW
Alias: CVE-2026-34956
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-31 17:50 UTC by OSIDB Bzimport
Modified: 2026-05-05 15:35 UTC (History)
18 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-03-31 17:50:03 UTC 
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.
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