CVE-2026-5124

NameCVE-2026-5124
DescriptionA security vulnerability has been detected in osrg GoBGP up to 4.3.0. Affected is the function BGPHeader.DecodeFromBytes of the file pkg/packet/bgp/bgp.go of the component BGP Header Handler. The manipulation leads to improper access controls. Remote exploitation of the attack is possible. The attack is considered to have high complexity. The exploitability is told to be difficult. The identifier of the patch is f0f24a2a901cbf159260698211ab15c583ced131. To fix this issue, it is recommended to deploy a patch.
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
forky, sid4.3.0-1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
gobgpsource(unstable)(unfixed)

Notes

https://github.com/osrg/gobgp/pull/3340
Fixed by: https://github.com/osrg/gobgp/commit/f0f24a2a901cbf159260698211ab15c583ced131

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