Bad local IPv6 connection reuse

{
  "id": "ef427430aee77d24b200c37a2d142e78d181a8b97fca8c8a519842a0da93103c",
  "url": "https://osv.dev/vulnerability/CURL-CVE-2022-27775",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Bad local IPv6 connection reuse",
    "summary": "libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse, if one of them matches the setup. Due to errors in the logic, the config matching function did not take the IPv6 address zone id into account which could lead to libcurl reusing the wrong connection when one transfer uses a zone id and a subsequent transfer uses another (or no) zone id.",
    "evidence": "osv:CURL-CVE-2022-27775",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CURL-CVE-2022-27775",
      "aliases": [
        "CURL-CVE-2022-27775",
        "CVE-2022-27775"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "7.65.0"
                },
                {
                  "fixed": "7.83.0"
                }
              ]
            },
            {
              "repo": "https://github.com/curl/curl.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2d0e9b40d3237b1450cbbfbcb996da244d964898"
                },
                {
                  "fixed": "058f98dc3fe595f21dc26a5b9b1699e519ba5705"
                }
              ]
            }
          ],
          "versions": [
            "7.82.0",
            "7.81.0",
            "7.80.0",
            "7.79.1",
            "7.79.0",
            "7.78.0",
            "7.77.0",
            "7.76.1",
            "7.76.0",
            "7.75.0",
            "7.74.0",
            "7.73.0",
            "7.72.0",
            "7.71.1",
            "7.71.0",
            "7.70.0",
            "7.69.1",
            "7.69.0",
            "7.68.0",
            "7.67.0",
            "7.66.0",
            "7.65.3",
            "7.65.2",
            "7.65.1",
            "7.65.0",
            "curl-7_82_0",
            "curl-7_81_0",
            "curl-7_80_0",
            "curl-7_79_1",
            "curl-7_79_0",
            "curl-7_78_0",
            "curl-7_77_0",
            "curl-7_76_1",
            "curl-7_76_0",
            "curl-7_75_0",
            "curl-7_74_0",
            "curl-7_73_0",
            "tiny-curl-7_72_0",
            "curl-7_72_0",
            "curl-7_71_1",
            "curl-7_71_0",
            "curl-7_70_0",
            "curl-7_69_1",
            "curl-7_69_0",
            "curl-7_68_0",
            "curl-7_67_0",
            "curl-7_66_0",
            "curl-7_65_3",
            "curl-7_65_2",
            "curl-7_65_1",
            "curl-7_65_0"
          ],
          "database_specific": {
            "source": "https://curl.se/docs/CURL-CVE-2022-27775.json",
            "vanir_signatures": [
              {
                "id": "CURL-CVE-2022-27775-5e38373e",
                "digest": {
                  "length": 551,
                  "function_hash": "64367765119075779025553468148609500840"
                },
                "source": "https://github.com/curl/curl.git/commit/058f98dc3fe595f21dc26a5b9b1699e519ba5705",
                "target": {
                  "file": "lib/conncache.c",
                  "function": "hashkey"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CURL-CVE-2022-27775-abbd0061",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "248884389636476368898680322381896570386",
                    "147333169977412059953814330311619140236",
                    "241286620235946974910977415580361700039",
                    "317199225891431119959600727241273204395"
                  ]
                },
                "source": "https://github.com/curl/curl.git/commit/058f98dc3fe595f21dc26a5b9b1699e519ba5705",
                "target": {
                  "file": "lib/conncache.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-25T01:04:43Z"
          }
        }
      ],
      "modified": "2026-10-25T01:04:43.739101686Z",
      "provider": "osv",
      "references": [],
      "provider_metadata": {
        "CWE": {
          "id": "CWE-200",
          "desc": "Exposure of Sensitive Information to an Unauthorized Actor"
        },
        "URL": "https://curl.se/docs/CVE-2022-27775.json",
        "www": "https://curl.se/docs/CVE-2022-27775.html",
        "award": {
          "amount": "480",
          "currency": "USD"
        },
        "issue": "https://hackerone.com/reports/1546268",
        "affects": "both",
        "package": "curl",
        "severity": "Low",
        "last_affected": "7.82.0"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-27775",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 444281,
  "published_at": "2022-04-27T08:00:00+00:00"
}