rust-libp2p-identity — security advisory

{
  "id": "6cbbbc9b2bf6d9f2f34a2a3aa8d3f87391c0265b7e426ac288c7e58d317ab5b8",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-33040",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-33040",
    "summary": "libp2p-rust is the official rust language Implementation of the libp2p networking stack. In versions prior to 0.49.3, the Gossipsub implementation accepts attacker-controlled PRUNE backoff values and may perform unchecked time arithmetic when storing backoff state. A specially crafted PRUNE control message with an extremely large backoff (e.g. u64::MAX) can lead to Duration/Instant overflow during backoff update logic, triggering a panic in the networking state machine. This is remotely reachable over a normal libp2p connection and does not require authentication. Any application exposing a libp2p Gossipsub listener and using the affected backoff-handling path can be crashed by a network attacker that can reach the service port. The attack can be repeated by reconnecting and replaying the crafted control message. This issue has been fixed in version 0.49.3.",
    "evidence": "osv:UBUNTU-CVE-2026-33040",
    "products": [
      {
        "name": {
          "value": "rust-libp2p-identity",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.2.10+20250205+ds-1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "rust-libp2p-identity",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.2.13+ds-1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "rust-libp2p-identity",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.2.10+20250205+ds-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "0.2.12+20250805+ds-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "0.2.13+ds-1",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "UBUNTU-CVE-2026-33040",
      "aliases": [
        "UBUNTU-CVE-2026-33040"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        },
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "rust-libp2p-identity",
            "purl": "pkg:deb/ubuntu/rust-libp2p-identity?arch=source&distro=questing",
            "ecosystem": "Ubuntu:25.10"
          },
          "versions": [
            "0.2.10+20250205+ds-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33040.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "librust-libp2p-identity-dev",
                "binary_version": "0.2.10+20250205+ds-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "rust-libp2p-identity",
            "purl": "pkg:deb/ubuntu/rust-libp2p-identity?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "0.2.13+ds-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33040.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "librust-libp2p-identity-dev",
                "binary_version": "0.2.13+ds-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "rust-libp2p-identity",
            "purl": "pkg:deb/ubuntu/rust-libp2p-identity?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "0.2.10+20250205+ds-1",
            "0.2.12+20250805+ds-2",
            "0.2.13+ds-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33040.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "librust-libp2p-identity-dev",
                "binary_version": "0.2.13+ds-1"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T12:59:59.413716895Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-33040"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-33040",
        "https://www.cve.org/CVERecord?id=CVE-2026-33040",
        "https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-gc42-3jg7-rxr2"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-33040",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 360070,
  "published_at": "2026-03-20T06:16:00+00:00"
}