CVE-2022-2929 DHCP memory leak

What is CVE-2022-2929?

CVE-2022-2929 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 7 Oct 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-770

Which versions are affected by CVE-2022-2929?

It affects 3 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Isc Dhcp.

How do I fix CVE-2022-2929?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2022-2929 being exploited?

There is no known exploitation of CVE-2022-2929 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2022-2929, DEBIAN-CVE-2022-2929, GHSA-wjcc-8xx5-frqg, UBUNTU-CVE-2022-2929.