sssd — security advisory

{
  "id": "de3b6324c9e19408316ed2aa419180ffc56eba6756be1447901c1c4d3c64687e",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-6245",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-6245",
    "summary": "A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting in a local Denial of Service (DoS).",
    "evidence": "osv:DEBIAN-CVE-2026-6245",
    "products": [
      {
        "name": {
          "value": "sssd",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.10.1-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.11.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.11.1-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.11.1-2.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.12.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.12.0-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.12.0-3~exp0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.12.0-4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.13.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.13.1-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.13.1-3",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "DEBIAN-CVE-2026-6245",
      "aliases": [
        "DEBIAN-CVE-2026-6245"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "sssd",
            "purl": "pkg:deb/debian/sssd?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "2.10.1-2",
            "2.11.1-1",
            "2.11.1-2",
            "2.11.1-2.1",
            "2.12.0-1",
            "2.12.0-2",
            "2.12.0-3~exp0",
            "2.12.0-4",
            "2.13.1-1",
            "2.13.1-2",
            "2.13.1-3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6245.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-27T09:47:36.280164066Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-6245"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-6245"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-6245",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 461240,
  "published_at": "2026-04-15T19:16:38.25+00:00"
}