CVE catalog
CVE-2026-42285
GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. In version 4.4.0, an unauthenticated remote BGP peer can trigger a fatal panic in GoBGP by sending
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.42% · Oct 25, 2026
GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. In version 4.4.0, an unauthenticated remote BGP peer can trigger a fatal panic in GoBGP by sending a specially crafted BGP UPDATE message. When the server receives a message with inconsistent attribute lengths, it improperly handles the internal state transition to a "withdraw" action, leading to a nil pointer dereference in the AdjRib.Update function. This causes the entire GoBGP process to crash, resulting in a complete loss of service availability. This issue has been patched in version 4.5.0.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | gobgp | sid | 4.8.0-1 | fixed |
| Debian | gobgp | forky | 4.8.0-1 | fixed |
| Debian | gobgp | trixie | 3.36.0-2 | not affected |
| Debian | gobgp | bookworm | 3.10.0-1 | not affected |
| Cpe | gobgp | Not reported | Not reported | unknown |
| Go | github.com/osrg/gobgp/v4 | Not reported | 4.5.0 | fixed |
| Cpe | gobgp | Not reported | Not reported | unknown |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | gobgp | source | sid | 4.5.0-1 | not yet assigned | Not reported | [1136049] |
| Debian | gobgp | source | forky | 4.5.0-1 | not yet assigned | Not reported | [1136049] |
| Debian | gobgp | source | trixie | Not affected | unimportant | Not reported | [1136049] |
| Debian | gobgp | source | bookworm | Not affected | unimportant | Not reported | [1136049] |
| Go | github.com/osrg/gobgp/v4 | Go | Not reported | 4.5.0 | Not reported | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [gobgpd]Not affected
Source package: [gobgp]
Details (2)
3.10.0-1+b4· amd64 · bookwormNot affected
nvd · gobgp · debian · bookworm
3.10.0-1+b4· arm64 · bookwormNot affected
nvd · gobgp · debian · bookworm
- [golang-github-osrg-gobgp-dev]Not affected
Source package: [gobgp]
Details (2)
3.10.0-1· all · bookwormNot affected
nvd · gobgp · debian · bookworm
3.10.0-1· all · bookwormNot affected
nvd · gobgp · debian · bookworm
Observed:
References
- [https://github.com/osrg/gobgp/releases/tag/v4.5.0]
- [https://github.com/osrg/gobgp/security/advisories/GHSA-p3w2-64xm-833j]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-42285]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-42285]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-42285]
- [https://pkg.go.dev/vuln/GO-2026-5525]
- [https://security-tracker.debian.org/tracker/CVE-2026-42285]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42285.json]
[Debian Security Tracker] · [FIRST EPSS] · [Go Vulnerability Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]