Security advisory

{
  "id": "f0b0de5b00155186f160dd2daf033c1eb683d872b3fc0e45223a2416dfca1478",
  "url": "https://osv.dev/vulnerability/CVE-2018-11243",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-11243",
    "summary": "PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of service (double free), limit the ability of a malware scanner to operate on the entire original data, or possibly have unspecified other impact via a crafted file.",
    "evidence": "osv:CVE-2018-11243",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-11243",
      "aliases": [
        "CVE-2018-11243"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/upx/upx",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7a3637ff5a800b8bcbad20ae7f668d8c8449b014"
                },
                {
                  "last_affected": "7a3637ff5a800b8bcbad20ae7f668d8c8449b014"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:upx:upx:3.95:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.95"
                      },
                      {
                        "last_affected": "3.95"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.95",
            "v3.95"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-11243.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:17.132656972Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D7XU42G6MUQQXHWRP7DCF2JSIBOJ5GOO/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUTVSTXAFTD552NO2K2RIF6MDQEHP3BE/",
        "https://github.com/upx/upx/blob/devel/NEWS",
        "https://github.com/upx/upx/issues/206",
        "https://github.com/upx/upx/issues/207"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-11243",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381482,
  "published_at": "2018-05-18T17:29:00.247+00:00"
}