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{"bugzilla": {"description": "mysql: Optimizer unspecified vulnerability (CPU Apr 2026)", "id": "2460279", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460279"}, "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-2026-22009", "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-2026-22009\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-22009\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": "2026-04-22T08:27:06.010067+00:00", "value": {"mitigation_remediation": ["Apply the latest Oracle MySQL Server security patch that fixes the optimizer flaw", "If a patch cannot be applied immediately, restrict network access to MySQL ports (e.g., 3306) by using firewall rules or network segmentation to limit connections to trusted hosts", "Configure server resource limits or fail\u2011over mechanisms to reduce the impact of repeated crashes"], "summary": {"action": "Patch Now", "impact": "Availability"}, "threat_synthesis": {"affected_systems": "Oracle 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 contain the vulnerable optimizer component.", "description_and_impact": "A flaw in the optimizer component of Oracle MySQL Server allows a low\u2011privileged attacker who can reach the server over the network to trigger a hang or repeatable crash, causing a denial of service. The weakness results in the server becoming unresponsive, which directly impacts availability while leaving confidentiality and integrity unaltered.", "risk_and_exploitability": "The vulnerability has a moderate CVSS v3.1 base score of 6.5, indicating a meaningful availability impact. Exploitation is feasible over the network using multiple protocols and requires only low privileged access with no user interaction. No exploitation data is publicly documented, the EPSS score is not available, and the flaw is not listed in CISA\u2019s KEV catalog, suggesting that public attacks have not yet been observed."}}}}, "created": "2026-04-22T01:45:05.391036+00:00", "title": "Denial of Service via Optimizer Component in Oracle MySQL Server", "updated": "2026-04-22T08:30:12.490530+00:00", "vendors": ["oracle", "oracle$PRODUCT$mysql_server"], "weaknesses": ["CWE-770", "CWE-399"]}