Security advisory

{
  "id": "36d1de0fdafa89d6d86454ec08b0fb57c1b1eed3dcea30648dd39ff8ec0b116a",
  "url": "https://osv.dev/vulnerability/CVE-2018-20651",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-20651",
    "summary": "A NULL pointer dereference was discovered in elf_link_add_object_symbols in elflink.c in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.31.1. This occurs for a crafted ET_DYN with no program headers. A specially crafted ELF file allows remote attackers to cause a denial of service, as demonstrated by ld.",
    "evidence": "osv:CVE-2018-20651",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-20651",
      "aliases": [
        "CVE-2018-20651"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://sourceware.org/git/binutils-gdb.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0860693812fff944ab0602e72b762a4a2078da5b"
                },
                {
                  "last_affected": "0860693812fff944ab0602e72b762a4a2078da5b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gnu:binutils:2.31.1:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.31.1"
                      },
                      {
                        "last_affected": "2.31.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.31.1",
            "binutils-2_31_1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20651.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:34.176629465Z",
      "provider": "osv",
      "references": [
        "https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git%3Bh=54025d5812ff100f5f0654eb7e1ffd50f2e37f5f",
        "https://usn.ubuntu.com/4336-1/",
        "https://security.gentoo.org/glsa/201908-01",
        "https://support.f5.com/csp/article/K38336243",
        "https://sourceware.org/bugzilla/show_bug.cgi?id=24041"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-20651",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 433456,
  "published_at": "2019-01-01T16:29:00.343+00:00"
}