CVE-2022-0324Public exploit

Relay shutdown via unchecked DHCPv6 option length

Published Nov 14, 2022 · Updated Apr 30, 2025

Buffer overflow in SONiC 202111 dhcp6relay allows remote attackers to crash the relay through a crafted DHCPv6 packet. The DHCPv6 option parser passes an unvalidated option payload length to memcpy, producing an out-of-bounds write. Remote attackers on an adjacent network need no credentials and can crash dhcp6relay, shutting down the DHCP relay container.

CVSS severity8.1
High
EPSS probability1.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in SONiC 202111 dhcp6relay allows remote attackers to crash the relay through a crafted DHCPv6 packet. The DHCPv6 option parser passes an unvalidated option payload length to memcpy, producing an out-of-bounds write. Remote attackers on an adjacent network need no credentials and can crash dhcp6relay, shutting down the DHCP relay container.

The record

CVE
CVE-2022-0324
Published
Nov 14, 2022
Updated
Apr 30, 2025
Vendor
Linux Foundation
Product
Software for Open Networking in the Cloud (SONiC)
Classifications
CWE-120, CWE-787, CAPEC-100, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=202111

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Linux Foundation · Software for Open Networking in the Cloud (SONiC)version=202111

Published CVSS scores

7.5National Institute of Standards and TechnologyCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.1Government Technology Agency of Singapore Cyber Security GroupCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-787Out-of-bounds Write
CAPEC-100Overflow Buffers
T1499.004Application or System Exploitation

Public exploit references

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

Technologies

Your stack

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Your stack

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