Security advisory

{
  "id": "5d26426d692b1e060f7d879020dc8612d738cc5c7226d1d801abc3ac42d58827",
  "url": "https://osv.dev/vulnerability/CVE-2021-20284",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-20284",
    "summary": "A flaw was found in GNU Binutils 2.35.1, where there is a heap-based buffer overflow in _bfd_elf_slurp_secondary_reloc_section in elf.c due to the number of symbols not calculated correctly. The highest threat from this vulnerability is to system availability.",
    "evidence": "osv:CVE-2021-20284",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-20284",
      "aliases": [
        "CVE-2021-20284"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/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": "7e46a74aa3713c563940960e361e08defda019c2"
                },
                {
                  "last_affected": "7e46a74aa3713c563940960e361e08defda019c2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gnu:binutils:2.35.1:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.35.1"
                      },
                      {
                        "last_affected": "2.35.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.35.1",
            "binutils-2_35_1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20284.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:53.438755037Z",
      "provider": "osv",
      "references": [
        "https://security.gentoo.org/glsa/202208-30",
        "https://security.netapp.com/advisory/ntap-20210521-0010/",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1937784",
        "https://sourceware.org/bugzilla/show_bug.cgi?id=26931"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-20284",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 437918,
  "published_at": "2021-03-26T17:15:13.063+00:00"
}