CVE-2026-42285

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

Published May 7, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-p3w2-64xm-833j GoBGP has a panic in AdjRib.Update via malformed BGP Update message (Nil Pointer Dereference)
History
Type Values Removed Values Added
CPEs cpe:2.3:a:osrg:gobgp:4.4.0:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Osrg
Osrg gobgp
Vendors & Products Osrg
Osrg gobgp
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title GoBGP: Panic in AdjRib.Update via malformed BGP Update message (Nil Pointer Dereference)
Weaknesses CWE-476
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 7, 2026, 1:04 PM
Reserved
Apr 26, 2026, 12:13 PM
Status
Analyzed
Published
May 7, 2026, 12:16 PM
Modified
Oct 26, 2026, 10:10 PM