gobgp: GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language
CVE-2026-41643 is fixed in 4 products on 1 platform, first by gobgpd 1.29-1ubuntu0.1+esm2, released May 7, 2026. It is not reported as exploited. Patch Radar priority: High.
GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Prior to version 4.3.0, a remote Denial of Service (DoS) vulnerability exists in GoBGP where a malformed BGP UPDATE message can trigger a runtime error: index out of range panic. This occurs during the processing of 4-byte AS attributes when the message structure causes an internal slice index shift that is not properly handled. This issue has been patched in version 4.3.0.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| gobgp · Debian 14 | 4.3.0-1 | DEBIAN-CVE-2026-41643 | May 15, 2026 |
| gobgpd · Ubuntu 18.04.6 LTS (bionic) | 1.29-1ubuntu0.1+esm2 | gobgpd 1.29-1ubuntu0.1+esm2 | May 7, 2026 |
| gobgpd · Ubuntu 20.04 LTS (focal) | 2.12.0-1ubuntu0.1~esm3 | gobgpd 2.12.0-1ubuntu0.1~esm3 | May 7, 2026 |
| gobgpd · Ubuntu 22.04.1 LTS (jammy) | 2.25.0-3ubuntu0.1+esm4 | gobgpd 2.25.0-3ubuntu0.1+esm4 | May 7, 2026 |
| gobgpd · Ubuntu 24.04.5 LTS (noble) | 3.23.0-1ubuntu0.3+esm4 | gobgpd 3.23.0-1ubuntu0.3+esm4 | May 7, 2026 |
| gobgpd · Ubuntu 26.04.1 LTS (resolute) | 3.36.0-2ubuntu0.1~esm1 | gobgpd 3.36.0-2ubuntu0.1~esm1 | May 7, 2026 |
| golang-github-osrg-gobgp-dev · Ubuntu 18.04.6 LTS (bionic) | 1.29-1ubuntu0.1+esm2 | golang-github-osrg-gobgp-dev 1.29-1ubuntu0.1+esm2 | May 7, 2026 |
| golang-github-osrg-gobgp-dev · Ubuntu 20.04 LTS (focal) | 2.12.0-1ubuntu0.1~esm3 | golang-github-osrg-gobgp-dev 2.12.0-1ubuntu0.1~esm3 | May 7, 2026 |
| 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 | May 7, 2026 |
| 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 | May 7, 2026 |
| 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 | May 7, 2026 |
| govulncheck-vulndb · opensuse-leap 16.0 | 0.0.20260727T201416-160000.1.1 | OPENSUSE-SU-2026:21551-1 | Aug 10, 2026 |
| govulncheck-vulndb · sles 16.0 | 0.0.20260727T201416-160000.1.1 | SUSE-SU-2026:23227-1 | Aug 10, 2026 |
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