CVE-2025-43973

Name: CVE-2025-43973
Creator: NVD / NIST
Published: 2025-04-21T01:15:45.67+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.47%

Last modified Jun 17, 2026

CVE-2025-43973 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in GoBGP before 3.35.0. pkg/packet/rtr/rtr.go does not verify that the input length corresponds to a situation in which all bytes are available for an RTR message.. EPSS estimates a 0.47% chance of exploitation in the next 30 days.

Description

An issue was discovered in GoBGP before 3.35.0. pkg/packet/rtr/rtr.go does not verify that the input length corresponds to a situation in which all bytes are available for an RTR message.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.47%

37.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Osrg	Gobgp	< 3.35.0

References

https://github.com/osrg/gobgp/commit/5693c58a4815cc6327b8d3b6980f0e5aced28abePatch
https://github.com/osrg/gobgp/compare/v3.34.0...v3.35.0Patch, Release Notes

Timeline

Published: Apr 21, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-43973?

An issue was discovered in GoBGP before 3.35.0. pkg/packet/rtr/rtr.go does not verify that the input length corresponds to a situation in which all bytes are available for an RTR message.

How severe is CVE-2025-43973?

CVE-2025-43973 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.

How do I fix CVE-2025-43973?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-43973?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST