{"id":"CVE-2026-101731","title":"mysql: MySQL Server: Denial of service in the Server Optimizer (CVE-2026-101731)","summary":"A flaw was found in the MySQL Server Optimizer. A remote attacker with high privileges can exploit this vulnerability over network protocols to cause the server to hang or crash repeatedly. This issue results in a complete denial of servic…","severity":"medium","cvss":4.9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-400","vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","affected":["enterprise_linux 10","enterprise_linux 9"],"published":"2026-10-20","updated":"2026-10-22","sourceUpdated":"2026-10-22T22:16:16+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101731.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101731.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-101731"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2557116"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-101731"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101731"},{"url":"https://www.oracle.com/security-alerts/cpuoct2026.html"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00454,"epssPercentile":0.39197,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-22T17:43:39.651659Z"},"ingestedAt":"2026-10-20T22:23:33.939Z","slug":"CVE-2026-101731","body":"## Overview\n\nA flaw was found in the MySQL Server Optimizer. A remote attacker with high privileges can exploit this vulnerability over network protocols to cause the server to hang or crash repeatedly. This issue results in a complete denial of service (DoS) for the database service.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-22 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101731.json)\n\n**mysql: MySQL Server: Denial of service in the Server Optimizer** — rated Moderate by Red Hat. Released 2026-10-20, updated 2026-10-22.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Hardened Images\n\n## Remediation\n\nAffected","depth":"sunlit","depthScore":27,"depthScoreParts":{"impact":27,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}