Description
GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Prior to version 4.7.0, GoBGP accepts a zero-length AS_PATH during UPDATE decoding and later panics while validating that attribute for a confederation eBGP peer. The vulnerable path is in the BGP UPDATE validator: a malformed UPDATE that should be rejected as a malformed AS_PATH instead reaches an unchecked `p.Value[0]` access, allowing a configured confederation eBGP peer to trigger a denial of service. Version 4.7.0 patches the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| osrg | gobgp | < 4.7.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | gobgp | 4.7.0-1 | — |
| Debian 13 | gobgp | No fix yet | — |
| Debian 12 | gobgp | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | gobgp | No fix yet | — |
| Ubuntu 25.10 | gobgp | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | gobgp | No fix yet | — |
| Ubuntu Pro 24.04 LTS | gobgp | No fix yet | — |
| Ubuntu Pro 22.04 LTS | gobgp | No fix yet | — |
| Ubuntu Pro 20.04 LTS | gobgp | No fix yet | — |
| Ubuntu Pro 18.04 LTS | gobgp | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | govulncheck-vulndb | 0.0.20260727T201416-160000.1.1 | SUSE-SU-2026:23227-1, SUSE-SU-2026:23216-1 |
| SLES 16.0 | govulncheck-vulndb | 0.0.20260727T201416-160000.1.1 | SUSE-SU-2026:23227-1, SUSE-SU-2026:23216-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260727T201416-160000.1.1 | openSUSE-SU-2026:21551-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | cilium-cli | 0.19.5-r3 | — |
| Wolfi rolling | kube-vip | 1.2.1-r2 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/osrg/gobgp/v4 | < 4.7.0 | 4.7.0 | GHSA-frrj-87jh-2772 |
Advisories 3
- SUSE-SU-2026:23227-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Aug 27, 2026
- SUSE-SU-2026:23216-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Aug 27, 2026
- openSUSE-SU-2026:21551-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Aug 12, 2026