# CVE-2025-43971: gobgp: An issue was discovered in GoBGP before 3.35.0

CVE-2025-43971 is fixed in 3 products on 1 platform, first by gobgpd 3.23.0-1ubuntu0.3+esm2, released April 20, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-43971
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0055
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 20, 2025

## Description

An issue was discovered in GoBGP before 3.35.0. pkg/packet/bgp/bgp.go allows attackers to cause a panic via a zero value for softwareVersionLen.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | gobgp Debian 13.5 (trixie) | 3.35.0-1 | [DEBIAN-CVE-2025-43971](https://patchblox.com/security/data/fix/linux/debian-cve-2025-43971.md) | Apr 21, 2025 |
| Linux | gobgp Debian 14 | 3.35.0-1 | [DEBIAN-CVE-2025-43971](https://patchblox.com/security/data/fix/linux/debian-cve-2025-43971.md) | Apr 21, 2025 |
| Linux | gobgpd Ubuntu 24.04.5 LTS (noble) | 3.23.0-1ubuntu0.3+esm2 | [gobgpd 3.23.0-1ubuntu0.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gobgpd-3.23.0-1ubuntu0.3-esm2.md) | Apr 20, 2025 |
| Linux | golang-github-osrg-gobgp-dev Ubuntu 24.04.5 LTS (noble) | 3.23.0-1ubuntu0.3+esm2 | [golang-github-osrg-gobgp-dev 3.23.0-1ubuntu0.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-golang-github-osrg-gobgp-dev-3.23.0-1ubuntu0.3-esm2.md) | Apr 20, 2025 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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