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{"bugzilla": {"description": "mysql: Optimizer unspecified vulnerability (CPU Apr 2026)", "id": "2460342", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460342"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["Oracle CPU describes the issue as following: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.0-8.0.45, 8.4.0-8.4.8 and 9.0.0-9.6.0. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server."], "name": "CVE-2026-22017", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "mysql8.4", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "mysql", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "mysql:8.0/mysql", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "mysql:8.4/mysql", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "mysql", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "mysql:8.4/mysql", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-22017\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-22017\nhttps://www.oracle.com/security-alerts/cpuapr2026.html\nhttps://www.oracle.com/security-alerts/cpuapr2026.html#AppendixMSQL"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Oracle MySQL Critical Patch Update.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.0.0,8.0.45]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.4.0,8.4.8]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.0.0,9.6.0]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "MySQL Server", "source": "cna", "vendor": "Oracle Corporation"}, "product": "mysql_server", "vendor": "oracle"}], "analysis": {"en": {"generated_at": "2026-04-27T19:41:55.738326+00:00", "value": {"mitigation_remediation": ["Apply the latest security patch released by Oracle for MySQL Server, as documented in the CPU for April\u00a02026.", "If a patch cannot be applied immediately, restrict network access to the MySQL servers by configuring firewalls or access control lists to limit traffic to trusted hosts and enforce the principle of least privilege for client connections.", "Monitor server logs for abnormal query patterns or sudden service restarts, and configure alerts for repeated crashes to detect exploitation attempts."], "summary": {"action": "Patch Immediately", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "Oracle Corporation's MySQL Server versions 8.0.0 through 8.0.45, 8.4.0 through 8.4.8, and 9.0.0 through 9.6.0 are affected. All deployments using these releases are vulnerable; version information is provided by Oracle in the referenced CPU.", "description_and_impact": "The vulnerability resides in the Optimizer component of Oracle MySQL Server. A low privileged attacker with network access can trigger repeated server crashes or hangs, resulting in a complete denial of service. The weakness impacts Availability only, with no direct effect on data integrity or confidentiality, as reflected in the CVSS vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.", "risk_and_exploitability": "The CVSS base score of 6.5 indicates a moderate severity with significant Availability impact. EPSS score of < 1% indicates a very low, but non-zero, probability of exploitation, while the vulnerability is described as easily exploitable, requiring only network connectivity and low-privileged access. It is not listed in the CISA KEV catalog. Attackers can compromise exposed MySQL endpoints by sending crafted queries that cause the Optimizer module to crash, leading to repeated server restarts."}}}}, "created": "2026-04-22T01:45:05.389565+00:00", "updated": "2026-04-27T19:45:11.343143+00:00", "vendors": ["oracle", "oracle$PRODUCT$mysql_server"]}