CVE-2026-41642

NameCVE-2026-41642
DescriptionGoBGP 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.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
gobgp (PTS)bullseye2.25.0-2vulnerable
bookworm3.10.0-1vulnerable
trixie3.36.0-2vulnerable
forky4.4.0-1fixed
sid4.5.0-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
gobgpsource(unstable)4.4.0-1

Notes

https://github.com/osrg/gobgp/security/advisories/GHSA-7235-89m6-f4px

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