Use-of-uninitialized-value in pcpp::MplsLayer::toString

{
  "id": "b908e6d5e37107d7f8463e6ac842efdc664d2a65314fca46a2c550f08aa6483a",
  "url": "https://osv.dev/vulnerability/OSV-2026-354",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Use-of-uninitialized-value in pcpp::MplsLayer::toString",
    "summary": "OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=489360236 ``` Crash type: Use-of-uninitialized-value Crash state: pcpp::MplsLayer::toString FuzzTarget.cpp pcpp::RawPacket::~RawPacket ```",
    "evidence": "osv:OSV-2026-354",
    "products": [
      {
        "name": {
          "value": "pcapplusplus",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "v24.09",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "v25.05",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "v26.07",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "v26.07-test",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "OSV-2026-354",
      "aliases": [
        "OSV-2026-354"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/seladb/PcapPlusPlus",
              "type": "GIT",
              "events": [
                {
                  "introduced": "813f15b87f5e76a62d64360f8cbdf449c21316e4"
                },
                {
                  "fixed": "3efa8b871549eb369a0201ffd8bc2a61fc932d7f"
                }
              ]
            }
          ],
          "package": {
            "name": "pcapplusplus",
            "purl": "pkg:generic/pcapplusplus",
            "ecosystem": "OSS-Fuzz"
          },
          "versions": [
            "v24.09",
            "v25.05",
            "v26.07",
            "v26.07-test"
          ],
          "database_specific": {
            "source": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/pcapplusplus/OSV-2026-354.yaml",
            "fixed_range": "200853b3a0b5ea2c443d6bee1a67f9c9c67b8f1b:3efa8b871549eb369a0201ffd8bc2a61fc932d7f",
            "introduced_range": "3227ad11ec457c3dad062db548432d2a1c837d50:0c95dfb3557644acc6a10060e48cfae1a61fc2f0"
          },
          "ecosystem_specific": {
            "severity": "MEDIUM"
          }
        }
      ],
      "modified": "2026-10-20T17:25:18.915888028Z",
      "provider": "osv",
      "references": [
        "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=489360236"
      ]
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 389858,
  "published_at": "2026-03-05T00:05:14.040862+00:00"
}