CVE-2026-41642

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.

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/v4.4.0	Patch Product
https://github.com/osrg/gobgp/security/advisories/GHSA-7235-89m6-f4px	Exploit Vendor Advisory
https://github.com/osrg/gobgp/security/advisories/GHSA-7235-89m6-f4px	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:osrg:gobgp:4.3.0:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-07 12:16

Updated : 2026-06-17 10:46

NVD link : CVE-2026-41642

Mitre link : CVE-2026-41642

CVE.ORG link : CVE-2026-41642

JSON object : View

Products Affected

osrg

gobgp

CWE

CWE-476

NULL Pointer Dereference

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