CVE-2026-42285 HIGH

CVE-2026-42285: GoBGP: Panic in AdjRib.Update via malformed BGP Update message (Nil Pointer Dereference)

Vendor Osrg
Product gobgp
Weakness CWE-476
Published May 7, 2026
Last update May 7, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 7, 2026 CVE published
May 7, 2026 Record updated