CVE-2022-36440 Denial of service in n/a

What is CVE-2022-36440?

CVE-2022-36440 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 3 Apr 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A reachable assertion was found in Frrouting frr-bgpd 8.3.0 in the peek_for_as4_capability function. Attackers can maliciously construct BGP open packets and send them to BGP peers running frr-bgpd, resulting in DoS.

Weakness: CWE-617

Which versions are affected by CVE-2022-36440?

It affects 3 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Frrouting Frrouting.

How do I fix CVE-2022-36440?

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-2022-36440 being exploited?

There is no known exploitation of CVE-2022-36440 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 DEBIAN-CVE-2022-36440, GHSA-cpmq-crvm-2w5p.