SASL double-free

{
  "id": "0798a6afdb4e0c509fafe36fd4c8b51a9085291bee63d4f94978b2985610ea2e",
  "url": "https://osv.dev/vulnerability/CURL-CVE-2026-8925",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "SASL double-free",
    "summary": "The curl logic that works with SASL authentication could end up cleaning up the GSASL context *twice* without clearing the pointer in between, making it `free()` the same pointer twice.",
    "evidence": "osv:CURL-CVE-2026-8925",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CURL-CVE-2026-8925",
      "aliases": [
        "CURL-CVE-2026-8925",
        "CVE-2026-8925"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "8.15.0"
                },
                {
                  "fixed": "8.16.1"
                },
                {
                  "introduced": "8.17.0"
                },
                {
                  "fixed": "8.20.1"
                },
                {
                  "introduced": "8.21.0"
                },
                {
                  "fixed": "8.21.0"
                }
              ]
            },
            {
              "repo": "https://github.com/curl/curl.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ab650379a8c25ca952f651476d25b4cdd77bb3fc"
                },
                {
                  "fixed": "3da249e1f0716c06644ed3522a37a8bf81808012"
                }
              ]
            }
          ],
          "versions": [
            "8.20.0",
            "8.19.0",
            "8.18.0",
            "8.17.0",
            "8.16.0",
            "8.15.0",
            "curl-8_20_0",
            "rc-8_20_0-3",
            "rc-8_20_0-2",
            "rc-8_20_0-1",
            "curl-8_19_0",
            "rc-8_19_0-3",
            "rc-8_19_0-2",
            "rc-8_19_0-1",
            "curl-8_18_0",
            "rc-8_18_0-3",
            "rc-8_18_0-2",
            "rc-8_18_0-1",
            "curl-8_17_0",
            "curl-8_16_0",
            "curl-8_15_0"
          ],
          "database_specific": {
            "source": "https://curl.se/docs/CURL-CVE-2026-8925.json",
            "vanir_signatures": [
              {
                "id": "CURL-CVE-2026-8925-2119fa0c",
                "digest": {
                  "length": 369,
                  "function_hash": "302084604714407525692251374694272900329"
                },
                "source": "https://github.com/curl/curl.git/commit/3da249e1f0716c06644ed3522a37a8bf81808012",
                "target": {
                  "file": "lib/vauth/gsasl.c",
                  "function": "Curl_auth_gsasl_is_supported"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CURL-CVE-2026-8925-3f7f0884",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "317222883309502823860142597895135200148",
                    "331108732736569959240708242580802890926",
                    "35931978830601830520329644919584359428",
                    "316091287703603607087007343834677822635",
                    "286034720472754720016913912006726094777",
                    "95164131527673258171731104945717953672",
                    "10060228462306698533293701394813706719"
                  ]
                },
                "source": "https://github.com/curl/curl.git/commit/3da249e1f0716c06644ed3522a37a8bf81808012",
                "target": {
                  "file": "lib/vauth/gsasl.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-25T01:05:22Z"
          }
        }
      ],
      "modified": "2026-10-25T01:05:22.126592013Z",
      "provider": "osv",
      "references": [],
      "provider_metadata": {
        "CWE": {
          "id": "CWE-415",
          "desc": "Double Free"
        },
        "URL": "https://curl.se/docs/CVE-2026-8925.json",
        "www": "https://curl.se/docs/CVE-2026-8925.html",
        "issue": "https://hackerone.com/reports/3735193",
        "affects": "both",
        "package": "curl",
        "severity": "Medium",
        "last_affected": "8.20.0"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-8925",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 444378,
  "published_at": "2026-06-24T08:00:00+00:00"
}