CVE-2022-4337

Daemon crash via unchecked AutoAttach element length

Published Jan 10, 2023 · Updated Aug 3, 2024

Out-of-bounds read in affected Open vSwitch releases allows remote attackers to crash ovs-vswitchd with a crafted LLDP packet. The lldp_decode routine handles an AutoAttach LLDP_TLV_AA_ELEMENT_SUBTYPE without first verifying the required 50-byte TLV length, so subsequent field reads cross the packet boundary. The packet reaches this parser only on a port with LLDP processing enabled, a setting disabled by default; successful exploitation interrupts the switch daemon and can also produce other undefined behavior.

CVSS severity9.8
Critical
EPSS probability1.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds read in affected Open vSwitch releases allows remote attackers to crash ovs-vswitchd with a crafted LLDP packet. The lldp_decode routine handles an AutoAttach LLDP_TLV_AA_ELEMENT_SUBTYPE without first verifying the required 50-byte TLV length, so subsequent field reads cross the packet boundary. The packet reaches this parser only on a port with LLDP processing enabled, a setting disabled by default; successful exploitation interrupts the switch daemon and can also produce other undefined behavior.

The record

CVE
CVE-2022-4337
Published
Jan 10, 2023
Updated
Aug 3, 2024
Vendor
Open vSwitch Project
Product
Open vSwitch
Classifications
CWE-125, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=openvswitch 3.0.3, openvswitch 2.17.5, openvswitch 2.16.6, openvswitch 2.15.7, openvswitch 2.14.8, openvswitch 2.13.10

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Open vSwitch Project · Open vSwitchversion=openvswitch 3.0.3, openvswitch 2.17.5, openvswitch 2.16.6, openvswitch 2.15.7, openvswitch 2.14.8, openvswitch 2.13.10

Published CVSS scores

9.8Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo