Security advisory

{
  "id": "3da2994f00fe86faf283094f413f6cfe5cfc5510ac26b0933576facfcfa969ff",
  "url": "https://osv.dev/vulnerability/CVE-2021-3826",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-3826",
    "summary": "Heap/stack buffer overflow in the dlang_lname function in d-demangle.c in libiberty allows attackers to potentially cause a denial of service (segmentation fault and crash) via a crafted mangled symbol.",
    "evidence": "osv:CVE-2021-3826",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-3826",
      "aliases": [
        "CVE-2021-3826"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/gcc-mirror/gcc",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7ca388565af176bd4efd4f8db1e5e9e11e98ef45"
                },
                {
                  "last_affected": "7ca388565af176bd4efd4f8db1e5e9e11e98ef45"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gnu:gcc:11.2:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "11.2"
                      },
                      {
                        "last_affected": "11.2"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "11.2",
            "releases/gcc-11.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3826.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:40.167411539Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-398330.html",
        "https://gcc.gnu.org/git/?p=gcc.git%3Ba=commit%3Bh=5481040197402be6dfee265bd2ff5a4c88e30505",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4MYLS3VR4OPL5ECRWOR4ZHMGXUSCJFZY/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6AKZ2DTS3ATVN5PANNVLKLE5OP4OF25Q/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7MTEHT3G6YKJ7F7MSGWYSI4UM3XBAYXZ/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AXFC74WRZ2Q7F2TSUKPYNIL7ZPBWYI6L/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H424YXGW7OKXS2NCAP35OP6Y4P4AW6VG/",
        "https://gcc.gnu.org/pipermail/gcc-patches/2021-September/579987"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "35"
                  },
                  {
                    "last_affected": "35"
                  },
                  {
                    "introduced": "36"
                  },
                  {
                    "last_affected": "36"
                  },
                  {
                    "introduced": "37"
                  },
                  {
                    "last_affected": "37"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-3826",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 434854,
  "published_at": "2022-09-01T21:15:08.843+00:00"
}