# CVE-2026-7734: gobgp: A vulnerability has been found in osrg GoBGP up to 4.3.0

CVE-2026-7734 is fixed in 4 products on 1 platform, first by gobgpd 2.25.0-3ubuntu0.1+esm4, released May 7, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-7734
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0046
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 3, 2026

## Description

A vulnerability has been found in osrg GoBGP up to 4.3.0. This impacts the function SRv6L3ServiceAttribute.DecodeFromBytes of the file pkg/packet/bgp/prefix_sid.go of the component SRv6 L3 Service. Such manipulation of the argument data leads to denial of service. The attack may be performed from remote. Upgrading to version 4.4.0 will fix this issue. The name of the patch is f9f7b55ec258e514be0264871fa645a2c3edad11. You should upgrade the affected component.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | gobgp Debian 14 | 4.4.0-1 | [DEBIAN-CVE-2026-7734](https://patchblox.com/security/data/fix/linux/debian-cve-2026-7734.md) | May 15, 2026 |
| Linux | gobgpd Ubuntu 22.04.1 LTS (jammy) | 2.25.0-3ubuntu0.1+esm4 | [gobgpd 2.25.0-3ubuntu0.1+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gobgpd-2.25.0-3ubuntu0.1-esm4.md) | May 7, 2026 |
| Linux | gobgpd Ubuntu 24.04.5 LTS (noble) | 3.23.0-1ubuntu0.3+esm4 | [gobgpd 3.23.0-1ubuntu0.3+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gobgpd-3.23.0-1ubuntu0.3-esm4.md) | May 7, 2026 |
| Linux | gobgpd Ubuntu 26.04.1 LTS (resolute) | 3.36.0-2ubuntu0.1~esm1 | [gobgpd 3.36.0-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gobgpd-3.36.0-2ubuntu0.1-esm1.md) | May 7, 2026 |
| Linux | golang-github-osrg-gobgp-dev Ubuntu 22.04.1 LTS (jammy) | 2.25.0-3ubuntu0.1+esm4 | [golang-github-osrg-gobgp-dev 2.25.0-3ubuntu0.1+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-golang-github-osrg-gobgp-dev-2.25.0-3ubuntu0.1-esm4.md) | May 7, 2026 |
| Linux | golang-github-osrg-gobgp-dev Ubuntu 24.04.5 LTS (noble) | 3.23.0-1ubuntu0.3+esm4 | [golang-github-osrg-gobgp-dev 3.23.0-1ubuntu0.3+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-noble-golang-github-osrg-gobgp-dev-3.23.0-1ubuntu0.3-esm4.md) | May 7, 2026 |
| Linux | golang-github-osrg-gobgp-dev Ubuntu 26.04.1 LTS (resolute) | 3.36.0-2ubuntu0.1~esm1 | [golang-github-osrg-gobgp-dev 3.36.0-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-golang-github-osrg-gobgp-dev-3.36.0-2ubuntu0.1-esm1.md) | May 7, 2026 |
| Linux | govulncheck-vulndb opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | [OPENSUSE-SU-2026:21483-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21483-1.md) | Jul 30, 2026 |

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Data as of 2026-11-08T00:53:09Z 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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