{"cve":"CVE-2023-25136","nvd":{"published":"2023-02-03T06:15:09.350","modified":"2026-10-14T23:17:15.010","status":"Modified","description":"OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling. This is fixed in OpenSSH 9.2. The double free can be leveraged, by an unauthenticated remote attacker in the default configuration, to jump to any location in the sshd address space. One third-party report states \"remote code execution is theoretically possible.\"","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","score":6.5},"cwes":["CWE-415"],"references":["http://www.openwall.com/lists/oss-security/2023/02/13/1","http://www.openwall.com/lists/oss-security/2023/02/22/1","http://www.openwall.com/lists/oss-security/2023/02/22/2","http://www.openwall.com/lists/oss-security/2023/02/23/3","http://www.openwall.com/lists/oss-security/2023/03/06/1"],"products":["fedoraproject:fedora","netapp:500f_firmware","netapp:a250_firmware","netapp:c250_firmware","netapp:ontap_select_deploy_administration_utility","openbsd:openssh"],"source":"nvd","synced_at":"2026-10-19T21:37:38.595364862+00:00"},"epss":{"cve":"CVE-2023-25136","score":0.89792,"percentile":0.99788,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}