CVE-2026-42285

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/osrg/gobgp/releases/tag/v4.5.0	Product Release Notes
https://github.com/osrg/gobgp/security/advisories/GHSA-p3w2-64xm-833j	Exploit Vendor Advisory
https://github.com/osrg/gobgp/security/advisories/GHSA-p3w2-64xm-833j	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:osrg:gobgp:4.4.0:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-07 12:16

Updated : 2026-06-17 10:47

NVD link : CVE-2026-42285

Mitre link : CVE-2026-42285

CVE.ORG link : CVE-2026-42285

JSON object : View

Products Affected

osrg

gobgp

CWE

CWE-476

NULL Pointer Dereference

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