CVE-2026-42285: CWE-476: NULL Pointer Dereference in osrg gobgp
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.
AI Analysis
Technical Summary
GoBGP 4.4.0 contains a NULL pointer dereference vulnerability (CWE-476) triggered by an unauthenticated remote BGP peer sending a crafted BGP UPDATE message with inconsistent attribute lengths. This leads to improper handling of internal state transitions to a withdraw action, causing a nil pointer dereference in the AdjRib.Update function and crashing the GoBGP process. This results in denial of service due to process termination. The vulnerability has been patched in GoBGP version 4.5.0.
Potential Impact
Exploitation causes a denial of service by crashing the GoBGP process, resulting in complete loss of BGP service availability. There is no impact on confidentiality or integrity according to the CVSS vector. The vulnerability can be triggered remotely without authentication.
Mitigation Recommendations
Upgrade GoBGP to version 4.5.0 or later, where this NULL pointer dereference vulnerability is patched. Since the vulnerability is fixed in the newer version, applying this official update is the recommended remediation. Patch status is confirmed by the vendor's versioning information.
CVE-2026-42285: CWE-476: NULL Pointer Dereference in osrg gobgp
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.
CVSS v3.1
Score 7.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
GoBGP 4.4.0 contains a NULL pointer dereference vulnerability (CWE-476) triggered by an unauthenticated remote BGP peer sending a crafted BGP UPDATE message with inconsistent attribute lengths. This leads to improper handling of internal state transitions to a withdraw action, causing a nil pointer dereference in the AdjRib.Update function and crashing the GoBGP process. This results in denial of service due to process termination. The vulnerability has been patched in GoBGP version 4.5.0.
Potential Impact
Exploitation causes a denial of service by crashing the GoBGP process, resulting in complete loss of BGP service availability. There is no impact on confidentiality or integrity according to the CVSS vector. The vulnerability can be triggered remotely without authentication.
Mitigation Recommendations
Upgrade GoBGP to version 4.5.0 or later, where this NULL pointer dereference vulnerability is patched. Since the vulnerability is fixed in the newer version, applying this official update is the recommended remediation. Patch status is confirmed by the vendor's versioning information.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-26T12:13:55.551Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fc83f6cbff5d8610e90d59
Added to database: 05/07/2026, 12:22:14 UTC
Last enriched: 05/07/2026, 12:36:27 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 101
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