CVE-2026-42285
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/osrg/gobgp/v4Go | >= 4.4.0, < 4.5.0 | 4.5.0 |
Affected products
3Patches
Vulnerability mechanics
References
4- github.com/osrg/gobgp/security/advisories/GHSA-p3w2-64xm-833jnvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-p3w2-64xm-833jghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-42285ghsaADVISORY
- github.com/osrg/gobgp/releases/tag/v4.5.0nvdProductRelease NotesWEB
News mentions
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