Description
GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. In version 4.4.0, an unauthenticated remote BGP peer can trigger a fatal panic in GoBGP by sending a specially crafted BGP UPDATE message. When the server receives a message with inconsistent attribute lengths, it improperly handles the internal state transition to a "withdraw" action, leading to a nil pointer dereference in the AdjRib.Update function. This causes the entire GoBGP process to crash, resulting in a complete loss of service availability. This issue has been patched in version 4.5.0.
Affected products
osrg: gobgp
References3
- github.com/osrg/gobgp/security/advisories/GHSA-p3w2-64xm-833j ExploitVendor Advisory
- github.com/osrg/gobgp/security/advisories/GHSA-p3w2-64xm-833j ExploitVendor Advisory
- github.com/osrg/gobgp/releases/tag/v4.5.0 ProductRelease Notes
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 37 · as of 13 November 2026
- CWE
- CWE-476
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