CVE-2026-41642

Summary

GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. In version 4.3.0, a remote Denial of Service (DoS) vulnerability exists in GoBGP due to a nil pointer dereference. When a malformed BGP UPDATE message contains an unrecognized Path Attribute marked as "Well-known," the daemon fails to interrupt the message handling flow. This results in an illegal memory access and a full process crash (panic). This issue has been patched in version 4.4.0.

Affected Software

Weaknesses

• CWE-476: CWE-476: NULL Pointer Dereference

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: partial

Additional References

• https://github.com/osrg/gobgp/security/advisories/GHSA-7235-89m6-f4px

References

• https://github.com/osrg/gobgp/security/advisories/GHSA-7235-89m6-f4px
• https://github.com/osrg/gobgp/releases/tag/v4.4.0

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