CVE catalog

CVE-2026-41642

GoBGP is an open source Border Gateway Protocol (BGP)…

[CVE catalog]

GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. In version 4.3.0, a remote Denial of Service (DoS) vulnerability exists in GoBGP due to a nil pointer dereference. When a malformed BGP UPDATE message contains an unrecognized Path Attribute marked as "Well-known," the daemon fails to interrupt the message handling flow. This results in an illegal memory access and a full process crash (panic). This issue has been patched in version 4.4.0.

Severity
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
Source
[NVD] · [CVE record]
EPSS
0.50% · Oct 27, 2026

Projects and upstream resources

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [
    {
      "name": "gobgp",
      "status": "fixed",
      "release": "sid",
      "version": "4.8.0-1"
    },
    {
      "name": "gobgp",
      "status": "fixed",
      "release": "forky",
      "version": "4.8.0-1"
    },
    {
      "name": "gobgp",
      "status": "not affected",
      "release": "trixie",
      "version": "3.36.0-2"
    },
    {
      "name": "gobgp",
      "status": "not affected",
      "release": "bookworm",
      "version": "3.10.0-1"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "gobgp",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "4.4.0-1"
    },
    {
      "bug": null,
      "name": "gobgp",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "4.4.0-1"
    },
    {
      "bug": null,
      "name": "gobgp",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "gobgp",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "unimportant",
      "fixed_version": "0"
    }
  ],
  "distribution_packages": [
    {
      "name": "gobgp",
      "ecosystem": "cpe",
      "fixed_version": ""
    },
    {
      "name": "github.com/osrg/gobgp/v4",
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "4.3.0"
            },
            {
              "fixed": "4.4.0"
            }
          ]
        }
      ],
      "ecosystem": "Go",
      "fixed_version": "4.4.0"
    },
    {
      "name": "gobgp",
      "ranges": [],
      "ecosystem": "cpe",
      "fixed_version": "",
      "provider_record_id": "NVD-CVE-2026-41642"
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [gobgpd]Unknown

    Source package: [gobgp]

    Details (2)

    • 3.10.0-1+b4 · amd64 · bookworm

      Not affected

      nvd · gobgp · debian · bookworm

    • 3.10.0-1+b4 · arm64 · bookworm

      Not affected

      nvd · gobgp · debian · bookworm

  • [golang-github-osrg-gobgp-dev]Unknown

    Source package: [gobgp]

    Details (2)

    • 3.10.0-1 · all · bookworm

      Not affected

      nvd · gobgp · debian · bookworm

    • 3.10.0-1 · all · bookworm

      Not affected

      nvd · gobgp · debian · bookworm

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [Go Vulnerability Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]