Security advisory

{
  "id": "5b3d96638f7eddfe9b10020520370b25938602270e2a64b88869ce0caba09e18",
  "url": "https://osv.dev/vulnerability/CVE-2021-39532",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-39532",
    "summary": "An issue was discovered in libslax through v0.22.1. A NULL pointer dereference exists in the function slaxLexer() located in slaxlexer.c. It allows an attacker to cause Denial of Service.",
    "evidence": "osv:CVE-2021-39532",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-39532",
      "aliases": [
        "CVE-2021-39532"
      ],
      "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/juniper/libslax",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "45d88a103c315519cd7e3566eec10dceb4ce9bdc"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:juniper:libslax:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.22.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.22.1",
            "0.22.0",
            "0.21.0",
            "0.20.2",
            "0.20.1",
            "0.19.0",
            "0.18.1",
            "0.18.0",
            "0.17.3",
            "0.17.2",
            "0.17.1",
            "0.17.0",
            "0.16.18",
            "0.16.17",
            "0.16.16",
            "0.16.15",
            "0.16.14",
            "0.16.13",
            "0.16.12",
            "0.16.11",
            "0.16.10",
            "sync-develop",
            "0.16.9",
            "0.16.8",
            "0.16.7",
            "0.16.6",
            "0.16.3",
            "0.16.2",
            "0.16.1",
            "libslax-0.16.0",
            "0.16.0",
            "v0.15.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-39532.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:53.320141463Z",
      "provider": "osv",
      "references": [
        "https://github.com/Juniper/libslax/issues/50"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-39532",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384730,
  "published_at": "2021-09-20T16:15:12.253+00:00"
}