NULL Pointer Dereference Affecting gobgp package, versions <4.4.0-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.5% (39th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-GOBGP-16632783
  • published11 May 2026
  • disclosed7 May 2026

Introduced: 7 May 2026

CVE-2026-41642  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Debian:unstable gobgp to version 4.4.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gobgp package and not the gobgp package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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 Base Scores

version 3.1