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DEBIAN-CVE-2026-5123

Type: advisorySource: OSV1 source record

A weakness has been identified in osrg GoBGP up to 4.3.0. This impacts the function DecodeFromBytes of the file pkg/packet/bgp/bgp.go. Executing a manipulation of the argument data[1] can lead to off-by-one. The attack may be launched remotely. Attacks of this nature are highly complex. The exploitability is said to be difficult. This patch is called 67c059413470df64bc20801c46f64058e88f800f. A patch should be applied to remediate this issue.

Announced Group revision 1
Original source ↗

DEBIAN-CVE-2026-5123

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-5123

gobgp

Source reference: /affected/0/package/name

Affected versions
3.10.0-1

Source reference: /affected/0/versions

3.16.0-1

Source reference: /affected/0/versions

3.19.0-1

Source reference: /affected/0/versions

3.21.0-1

Source reference: /affected/0/versions

3.23.0-1

Source reference: /affected/0/versions

3.25.0-1

Source reference: /affected/0/versions

3.27.0-1

Source reference: /affected/0/versions

3.28.0-1

Source reference: /affected/0/versions

3.29.0-1

Source reference: /affected/0/versions

3.30.0-1

Source reference: /affected/0/versions

3.31.0-1

Source reference: /affected/0/versions

3.32.0-1

Source reference: /affected/0/versions

3.33.0-1

Source reference: /affected/0/versions

3.35.0-1

Source reference: /affected/0/versions

3.36.0-1

Source reference: /affected/0/versions

3.36.0-2

Source reference: /affected/0/versions

4.3.0-1

Source reference: /affected/0/versions

4.4.0-1

Source reference: /affected/0/versions

4.5.0-1

Source reference: /affected/0/versions

4.5.0-1~bpo13+1

Source reference: /affected/0/versions

4.6.0-1

Source reference: /affected/0/versions

4.6.0-2

Source reference: /affected/0/versions

4.6.0-2~bpo13+1

Source reference: /affected/0/versions

4.7.0-1

Source reference: /affected/0/versions

4.7.0-1~bpo13+1

Source reference: /affected/0/versions

4.8.0-1

Source reference: /affected/0/versions

4.8.0-2~exp1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

gobgp

Source reference: /affected/1/package/name

Affected versions
3.36.0-2

Source reference: /affected/1/versions

4.3.0-1

Source reference: /affected/1/versions

4.4.0-1

Source reference: /affected/1/versions

4.5.0-1

Source reference: /affected/1/versions

4.5.0-1~bpo13+1

Source reference: /affected/1/versions

4.6.0-1

Source reference: /affected/1/versions

4.6.0-2

Source reference: /affected/1/versions

4.6.0-2~bpo13+1

Source reference: /affected/1/versions

4.7.0-1

Source reference: /affected/1/versions

4.7.0-1~bpo13+1

Source reference: /affected/1/versions

4.8.0-1

Source reference: /affected/1/versions

4.8.0-2~exp1

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

gobgp

Source reference: /affected/2/package/name

Affected versions
3.36.0-2

Source reference: /affected/2/versions

4.3.0-1

Source reference: /affected/2/versions

Fixed versions
4.4.0-1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "gobgp",
      "purl": "pkg:deb/debian/gobgp?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.10.0-1",
      "3.16.0-1",
      "3.19.0-1",
      "3.21.0-1",
      "3.23.0-1",
      "3.25.0-1",
      "3.27.0-1",
      "3.28.0-1",
      "3.29.0-1",
      "3.30.0-1",
      "3.31.0-1",
      "3.32.0-1",
      "3.33.0-1",
      "3.35.0-1",
      "3.36.0-1",
      "3.36.0-2",
      "4.3.0-1",
      "4.4.0-1",
      "4.5.0-1",
      "4.5.0-1~bpo13+1",
      "4.6.0-1",
      "4.6.0-2",
      "4.6.0-2~bpo13+1",
      "4.7.0-1",
      "4.7.0-1~bpo13+1",
      "4.8.0-1",
      "4.8.0-2~exp1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5123.json"
    },
    "ecosystem_specific": {
      "urgency": "unimportant"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "gobgp",
      "purl": "pkg:deb/debian/gobgp?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.36.0-2",
      "4.3.0-1",
      "4.4.0-1",
      "4.5.0-1",
      "4.5.0-1~bpo13+1",
      "4.6.0-1",
      "4.6.0-2",
      "4.6.0-2~bpo13+1",
      "4.7.0-1",
      "4.7.0-1~bpo13+1",
      "4.8.0-1",
      "4.8.0-2~exp1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5123.json"
    },
    "ecosystem_specific": {
      "urgency": "unimportant"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "4.4.0-1"
          }
        ]
      }
    ],
    "package": {
      "name": "gobgp",
      "purl": "pkg:deb/debian/gobgp?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.36.0-2",
      "4.3.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5123.json"
    },
    "ecosystem_specific": {
      "urgency": "unimportant"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#57765 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-5123 · Revision 1Source updated