Description
An out-of-bounds read in the ParseIP6Extended function (/bgp/bgp.go) of gobgp v4.3.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted BGP UPDATE message.
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 | 4.4.0-1 | — |
| Debian 13 | gobgp | No fix yet | — |
| Debian 12 | gobgp | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 | 3.36.0-2ubuntu0.1~esm1 | USN-8348-1 |
| Ubuntu Pro 24.04 LTS | gobgp | 3.23.0-1ubuntu0.3+esm4 | USN-8348-1 |
| Ubuntu Pro 22.04 LTS | gobgp | 2.25.0-3ubuntu0.1+esm4 | USN-8348-1 |
| Ubuntu Pro 20.04 LTS | gobgp | 2.12.0-1ubuntu0.1~esm3 | USN-8348-1 |
| Ubuntu Pro 18.04 LTS | gobgp | 1.29-1ubuntu0.1+esm2 | USN-8348-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/osrg/gobgp/v4 | < 4.4.0 | 4.4.0 | GHSA-wmvj-f67g-qg4g |
Advisories 2
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026
- USN-8348-1 gobgp vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026