CVE catalog

CVE-2025-43973

GoBGP vulnerabilities

[CVE catalog]

An issue was discovered in GoBGP before 3.35.0. pkg/packet/rtr/rtr.go does not verify that the input length corresponds to a situation in which all bytes are available for an RTR message.

Severity
Critical · CVSS 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
Source
[NVD] · [CVE record]
EPSS
0.57% · 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": "fixed",
      "release": "trixie",
      "version": "3.36.0-2"
    },
    {
      "name": "gobgp",
      "status": "vulnerable",
      "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": "3.35.0-1"
    },
    {
      "bug": null,
      "name": "gobgp",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "3.35.0-1"
    },
    {
      "bug": null,
      "name": "gobgp",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "3.35.0-1"
    },
    {
      "bug": null,
      "name": "gobgp",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "gobgp",
      "distro": "ubuntu",
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "not yet fixed"
    },
    {
      "name": "gobgp",
      "distro": "ubuntu",
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "3.23.0-1ubuntu0.3+esm2"
    },
    {
      "name": "gobgpd",
      "distro": "ubuntu",
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "3.23.0-1ubuntu0.3+esm2"
    },
    {
      "name": "golang-github-osrg-gobgp-dev",
      "distro": "ubuntu",
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "3.23.0-1ubuntu0.3+esm2"
    },
    {
      "name": "gobgp",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.23.0-1ubuntu0.3+esm2"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "3.16.0-1build1",
        "3.19.0-1",
        "3.21.0-1",
        "3.23.0-1",
        "3.23.0-1ubuntu0.1",
        "3.23.0-1ubuntu0.2",
        "3.23.0-1ubuntu0.2+esm1",
        "3.23.0-1ubuntu0.3",
        "3.23.0-1ubuntu0.3+esm1"
      ],
      "ecosystem": "deb",
      "fixed_version": "3.23.0-1ubuntu0.3+esm2",
      "provider_record_id": "UBUNTU-CVE-2025-43973"
    }
  ]
}

Publisher notes

[bookworm] gobgp: Minor issue

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

      Affected

      usn · gobgp · debian · bookworm; usn · gobgp · debian · 12

    • 3.10.0-1+b4 · arm64 · bookworm

      Affected

      usn · gobgp · debian · bookworm; usn · gobgp · debian · 12

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

    Source package: [gobgp]

    Details (2)

    • 3.10.0-1 · all · bookworm

      Affected

      usn · gobgp · debian · bookworm; usn · gobgp · debian · 12

    • 3.10.0-1 · all · bookworm

      Affected

      usn · gobgp · debian · bookworm; usn · gobgp · debian · 12

[Debian 13 (Trixie)]

  • [gobgpd]Unknown

    Source package: [gobgp]

    Details (4)

    • 3.36.0-2+b3 · amd64 · trixie

      Fixed · Fixed: 3.35.0-1

      usn · gobgp · debian · 13

    • 3.36.0-2+b3 · arm64 · trixie

      Fixed · Fixed: 3.35.0-1

      usn · gobgp · debian · 13

    • 4.7.0-1~bpo13+1 · amd64 · trixie-backports

      Fixed · Fixed: 3.35.0-1

      usn · gobgp · debian · 13

    • 4.7.0-1~bpo13+1 · arm64 · trixie-backports

      Fixed · Fixed: 3.35.0-1

      usn · gobgp · debian · 13

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

    Source package: [gobgp]

    Details (4)

    • 3.36.0-2 · all · trixie

      Fixed · Fixed: 3.35.0-1

      usn · gobgp · debian · 13

    • 3.36.0-2 · all · trixie

      Fixed · Fixed: 3.35.0-1

      usn · gobgp · debian · 13

    • 4.7.0-1~bpo13+1 · all · trixie-backports

      Fixed · Fixed: 3.35.0-1

      usn · gobgp · debian · 13

    • 4.7.0-1~bpo13+1 · all · trixie-backports

      Fixed · Fixed: 3.35.0-1

      usn · gobgp · debian · 13

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]