CVE-2022-26127 Memory corruption in FRRouting

High 7.8 Published 3 Mar 2022 Updated 4 Nov 2025

A buffer overflow in FRRouting's Babel protocol allows remote attackers to execute arbitrary code or cause a denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2022-26127?

CVE-2022-26127 is a high-severity memory corruption vulnerability in FRRouting, published on 3 Mar 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

A buffer overflow vulnerability exists in FRRouting through 8.1.0 due to missing a check on the input packet length in the babel_packet_examin function in babeld/message.c.

Weakness: CWE-1284, CWE-119

Which versions are affected by CVE-2022-26127?

It affects 1 product.

Products include Frrouting Frrouting.

How do I fix CVE-2022-26127?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2022-26127 being exploited?

There is no known exploitation of CVE-2022-26127 in the wild and no public exploit code.

Sources

Also known as CLEANSTART-2025-HP01614, DEBIAN-CVE-2022-26127, GHSA-5xgr-wq7f-67xj, UBUNTU-CVE-2022-26127.