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Vulnerabilities

Vulnerability · CVE-2025-43973

An issue was discovered in GoBGP before 3.35.0.

Published Apr 21, 2025 · catalog updated Apr 21, 2025 · GoBGP GoBGP

Check if you run it

No confirmed exploitation is on record for CVE-2025-43973. EPSS is 0.56%. Act only if a listed version of GoBGP GoBGP is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.56%
Remediation
Version ranges on file
Affected products
vendor GoBGP GoBGP 0 <3.35.0

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor GoBGP GoBGP 0 <3.35.00 <3.35.0

How to fix CVE-2025-43973

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-43973. EPSS is 0.56%. Act only if a listed version of GoBGP GoBGP is installed.

Which versions are affected?

Compare what you have installed with GoBGP GoBGP 0 <3.35.0 0 <3.35.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.56%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 21, 2025 · EUVD

    Detected

    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.

  2. Apr 21, 2025 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2025-43973

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-43973

    30-day exploitation probability 0.6%

    first.org
  • EUVDVulnerability recordEUVD-2025-12347

    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.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.