CVE-2026-7734 osrg GoBGP SRv6 L3 Service prefix_sid.go SRv6L3ServiceAttribute.DecodeFromBytes denial of service

What is CVE-2026-7734?

CVE-2026-7734 is a medium-severity vulnerability in osrg GoBGP, published on 4 May 2026.

Official 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.

Weakness: CWE-404

Which versions are affected by CVE-2026-7734?

3 open source packages ship an affected version, including github.com/osrg/gobgp/v4. It affects 1 product.

Products include Osrg Gobgp.

How do I fix CVE-2026-7734?

Upgrade github.com/osrg/gobgp/v4 to 4.4.0 or later.

Is CVE-2026-7734 being exploited?

There is no known exploitation of CVE-2026-7734 in the wild and no public exploit code.

Other vulnerabilities in osrg GoBGP

• CVE-2025-43971 GoBGP panics due to a zero value for softwareVersionLen High 8.6
• CVE-2026-41642 GoBGP: Remote Denial of Service (Panic) via Malformed Well-known Path Attribute High 7.5
• CVE-2026-41643 GoBGP: Remote Denial of Service (Panic) in UpdatePathAttrs4ByteAs via Malformed BGP UPDATE High 7.5
• CVE-2026-42285 GoBGP: Panic in AdjRib.Update via malformed BGP Update message (Nil Pointer Dereference) High 7.5
• CVE-2026-37461 GoBGP has an out-of-bounds read in the ParseIP6Extended function High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-7734, GHSA-vm3g-8xwv-mxfp, GO-2026-5665, UBUNTU-CVE-2026-7734.