CVE-2026-42285: high-severity vulnerability in osrg gobgp
GoBGP: Panic in AdjRib.Update via malformed BGP Update message (Nil Pointer Dereference)
Published
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.4%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
osrg · gobgpRelated CVEs — osrg gobgp
In the same product, most dangerous first.
CVE-2026-41643HIGHGoBGP: Remote Denial of Service (Panic) in UpdatePathAttrs4ByteAs via Malformed BGP UPDATEEPSS 0.5%CVE-2026-41642HIGHGoBGP: Remote Denial of Service (Panic) via Malformed Well-known Path AttributeEPSS 0.5%CVE-2026-49838MEDIUMGoBGP confederation validation panics on empty AS_PATH attributeEPSS 0.4%CVE-2026-49837MEDIUMGoBGP: BGP OPEN capability parser may read capability values outside declared CapLen boundariesEPSS 0.3%