CUPS has a use-after-free in `cupsdDeleteTemporaryPrinters` via dangling subscription pointer

{
  "id": "75ab4e0489ebb40fe83f501b125a1c30670e0512d076eb5475dddc7d1bde2ab8",
  "url": "https://osv.dev/vulnerability/CVE-2026-39316",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CUPS has a use-after-free in `cupsdDeleteTemporaryPrinters` via dangling subscription pointer",
    "summary": "OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, a use-after-free vulnerability exists in the CUPS scheduler (cupsd) when temporary printers are automatically deleted. cupsdDeleteTemporaryPrinters() in scheduler/printers.c calls cupsdDeletePrinter() without first expiring subscriptions that reference the printer, leaving cupsd_subscription_t.dest as a dangling pointer to freed heap memory. The dangling pointer is subsequently dereferenced at multiple code sites, causing a crash (denial of service) of the cupsd daemon. With heap grooming, this can be leveraged for code execution.",
    "evidence": "osv:CVE-2026-39316",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-39316",
      "aliases": [
        "CVE-2026-39316",
        "GHSA-pjv5-prqp-46rg"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openprinting/cups",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "7523763f00d2063f88026d93bc5b29806240de2b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.4.16"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:openprinting:cups:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.4.16"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.4.16",
            "v2.4.15",
            "v2.4.14",
            "v2.4.13",
            "v2.4.12",
            "v2.4.11",
            "v2.4.10",
            "v2.4.9",
            "v2.4.8",
            "v2.4.7",
            "v2.4.6",
            "v2.4.5",
            "v2.4.3",
            "v2.4.4",
            "v2.4.2",
            "v2.4.1",
            "v2.4.0",
            "v2.4rc1",
            "v2.4b1",
            "v2.3.3op2",
            "v2.3.3op1",
            "v2.3.3",
            "v2.3.1",
            "v2.3.0",
            "v2.3rc1",
            "v2.3b8",
            "v2.3b7",
            "v2.3b6",
            "v2.3b5",
            "v2.3b4",
            "v2.3b3",
            "v2.3b2",
            "v2.3b1",
            "v2.2.6",
            "v2.2.5",
            "v2.2.4",
            "v2.2.3",
            "v2.2.2",
            "v2.2.1",
            "v2.2.0",
            "v2.2rc1",
            "v2.2b2",
            "v2.2b1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39316.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.278851817Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39316.json",
        "https://github.com/OpenPrinting/cups/security/advisories/GHSA-pjv5-prqp-46rg",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-39316"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-416"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39316.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-39316",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491951,
  "published_at": "2026-04-07T17:00:26.801+00:00"
}