Security advisory

{
  "id": "f0891e102e855bac6f29fb0a7f036826f90afccb37d5eee0b968b896479f4b11",
  "url": "https://osv.dev/vulnerability/CVE-2021-3998",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-3998",
    "summary": "A flaw was found in glibc. The realpath() function can mistakenly return an unexpected value, potentially leading to information leakage and disclosure of sensitive data.",
    "evidence": "osv:CVE-2021-3998",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-3998",
      "aliases": [
        "CVE-2021-3998"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/bminor/glibc",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9826b03b747b841f5fc6de2054bf1ef3f5c4bdf3"
                },
                {
                  "fixed": "f94f6d8a3572840d3ba42ab9ace3ea522c99c0c2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.33"
                      },
                      {
                        "fixed": "2.35"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "glibc-2.34",
            "glibc-2.34.9000",
            "glibc-2.33",
            "glibc-2.33.9000"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3998.json"
          }
        },
        {
          "ranges": [
            {
              "repo": "https://sourceware.org/git/glibc.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9826b03b747b841f5fc6de2054bf1ef3f5c4bdf3"
                },
                {
                  "fixed": "f94f6d8a3572840d3ba42ab9ace3ea522c99c0c2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.33"
                      },
                      {
                        "fixed": "2.35"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "glibc-2.34",
            "glibc-2.34.9000",
            "glibc-2.33",
            "glibc-2.33.9000"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3998.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:16.972449179Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-398330.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-831302.html",
        "https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=84d2d0fe20bdf94feed82b21b4d7d136db471f03",
        "https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=ee8d5e33adb284601c00c94687bc907e10aec9bb",
        "https://access.redhat.com/security/cve/CVE-2021-3998",
        "https://security-tracker.debian.org/tracker/CVE-2021-3998",
        "https://security.netapp.com/advisory/ntap-20221020-0003/",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2024633",
        "https://sourceware.org/bugzilla/show_bug.cgi?id=28770",
        "https://www.openwall.com/lists/oss-security/2022/01/24/4"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-3998",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 429454,
  "published_at": "2022-08-24T16:15:09.01+00:00"
}