{"id":"CVE-2026-107886","details":"OpenPrinting CUPS before 2.4.20 contains a double-free in printer-class management. When CUPS-Add-Modify-Class replaces an existing class member list, add_class() frees pclass-\u003eprinters without clearing the pointer. If subsequent validation fails, the class retains the dangling pointer; CUPS-Delete-Class subsequently frees the same allocation in cupsdDeletePrinter(). A client authorized to modify and delete classes can cause scheduler-wide denial of service. The default policy requires @SYSTEM privileges.","aliases":["GHSA-pwg4-pv39-8c22"],"modified":"2026-10-10T02:47:23.551268399Z","published":"2026-10-09T04:00:29.308Z","database_specific":{"cwe_ids":["CWE-415"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107886.json","cna_assigner":"mitre"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107886.json"},{"type":"ADVISORY","url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-pwg4-pv39-8c22"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107886"},{"type":"PACKAGE","url":"https://github.com/OpenPrinting/cups"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openprinting/cups","events":[{"introduced":"b7d698516c20e284279e090951f7e52c4d04885c"},{"fixed":"ef80eeaea51430a055948240eea3f28ef5354edf"}],"database_specific":{"extracted_events":[{"introduced":"1.4.8"},{"fixed":"2.4.20"},{"introduced":"0"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107886.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L"}]}