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TI-2026-30596 Aliases CVE-2026-42285GHSA-p3w2-64xm-833j

GoBGP: Panic in AdjRib.Update via malformed BGP Update message (Nil Pointer Dereference)

Priority HIGH 72CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-476.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00418 36th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed github.com/osrg/gobgp/v4 (Go): 4.5.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
osrggobgp= 4.4.0—No fix listedCNA
—github.com/osrg/gobgp/v4 (Go)4.4.0 to before 4.5.04.5.0Patch availableGHSA-p3w2-64xm-833j
  • gobgp Vendorosrg Affected = 4.4.0 Fixed in — No fix listed CNA
  • github.com/osrg/gobgp/v4 (Go) Vendor— Affected 4.4.0 to before 4.5.0 Fixed in 4.5.0 Patch available GHSA-p3w2-64xm-833j

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:osrg:gobgp:4.4.0:*:*:*:*:*:*:*4.4.0Vulnerableosrg
  • cpe:2.3:a:osrg:gobgp:4.4.0:*:*:*:*:*:*:* Versions 4.4.0 Vulnerable ·osrg

Remediation

  • Fix · GHSA-p3w2-64xm-833j github.com/osrg/gobgp/v4 (Go) Fixed in 4.5.0 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat OpenShift Container Platform 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-42285
  2. 2026-10-03 Alias added: GHSA-p3w2-64xm-833j

References

Exploit 1

Advisory 1

Other 2

  • TI-2026-30162 GoBGP: Remote Denial of Service (Panic) in UpdatePathAttrs4ByteAs via Malformed BGP UPDATE CVSS 3.1HIGH 7.5
  • TI-2026-30161 GoBGP: Remote Denial of Service (Panic) via Malformed Well-known Path Attribute CVSS 3.1HIGH 7.5
  • TI-2026-23526 An issue in GoBGP gobgpd v.4.2.0 allows a remote attacker to cause a denial of service via the NEXT_HOP path attribute CVSS 3.1HIGH 7.5
  • TI-2025-28529 An issue was discovered in GoBGP before 3.35.0. CVSS 3.1HIGH 8.6
  • TI-2025-28531 An issue was discovered in GoBGP before 3.35.0. CVSS 3.1CRITICAL 9.8
  • TI-2026-28050 An out-of-bounds read in the ParseIP6Extended function (/bgp/bgp.go) of gobgp v4.3.0… CVSS 3.1HIGH 7.5
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences