{ "document": { "aggregate_severity": { "text": "Medium" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/tuxcare9.6esu/vex/2026/cve-2026-21950-els_os-tuxcare9_6esu.json" } ], "tracking": { "current_release_date": "2026-05-07T11:59:40Z", "generator": { "date": "2026-05-07T11:59:40Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-21950-ELS_OS-TUXCARE9.6ESU", "initial_release_date": "2026-01-20T00:00:00Z", "revision_history": [ { "date": "2026-01-20T00:00:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-03-02T15:05:18Z", "number": "2", "summary": "Official Publication" }, { "date": "2026-03-14T09:49:41Z", "number": "3", "summary": "Update document" }, { "date": "2026-05-07T11:59:40Z", "number": "4", "summary": "Update document" } ], "status": "final", "version": "4" }, "title": "Security update on CVE-2026-21950" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "AlmaLinux 9.6", "product": { "name": "AlmaLinux 9.6", "product_id": "AlmaLinux-9.6", "product_identification_helper": { "cpe": "cpe:2.3:o:almalinux:almalinux:9.6:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "AlmaLinux" } ], "category": "vendor", "name": "AlmaLinux OS Foundation" }, { "branches": [ { "branches": [ { "category": "product_name", "name": "Rocky Linux 9.6", "product": { "name": "Rocky Linux 9.6", "product_id": "Rocky Linux-9.6", "product_identification_helper": { "cpe": "cpe:2.3:o:resf:rocky_linux:9.6:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Rocky Linux" } ], "category": "vendor", "name": "Rocky Linux" }, { "branches": [ { "branches": [ { 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"mysql-server-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "relates_to_product_reference": "Rocky Linux-9.6" }, { "category": "default_component_of", "full_product_name": { "name": "mysql-errmsg-0:8.0.45-1.el9_6.tuxcare.els1.x86_64 as a component of Rocky Linux 9.6", "product_id": "Rocky Linux-9.6:mysql-errmsg-0:8.0.45-1.el9_6.tuxcare.els1.x86_64" }, "product_reference": "mysql-errmsg-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "relates_to_product_reference": "Rocky Linux-9.6" }, { "category": "default_component_of", "full_product_name": { "name": "mysql-test-0:8.0.45-1.el9_6.tuxcare.els1.x86_64 as a component of Rocky Linux 9.6", "product_id": "Rocky Linux-9.6:mysql-test-0:8.0.45-1.el9_6.tuxcare.els1.x86_64" }, "product_reference": "mysql-test-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "relates_to_product_reference": "Rocky Linux-9.6" }, { "category": "default_component_of", "full_product_name": { "name": "mysql-0:8.0.45-1.el9_6.tuxcare.els1.x86_64 as a component of Rocky Linux 9.6", "product_id": "Rocky Linux-9.6:mysql-0:8.0.45-1.el9_6.tuxcare.els1.x86_64" }, "product_reference": "mysql-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "relates_to_product_reference": "Rocky Linux-9.6" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-21950", "notes": [ { "category": "description", "text": "Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 9.0.0-9.5.0. 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. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" }, { "category": "other", "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.", "title": "Statement" } ], "product_status": { "known_not_affected": [ "AlmaLinux-9.6:mysql-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-common-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-common-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-devel-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-devel-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-errmsg-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-errmsg-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-libs-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-libs-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-server-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-server-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-test-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-test-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-common-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-common-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-devel-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-devel-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-errmsg-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-errmsg-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-libs-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-libs-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-server-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-server-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-test-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-test-0:8.0.45-1.el9_6.tuxcare.els1.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-21950" } ], "release_date": "2026-01-20T00:00:00Z", "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1" }, "products": [ "AlmaLinux-9.6:mysql-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-common-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-common-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-devel-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-devel-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-errmsg-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-errmsg-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-libs-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-libs-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-server-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-server-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-test-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-test-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-common-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-common-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-devel-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-devel-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-errmsg-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-errmsg-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-libs-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-libs-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-server-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-server-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-test-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-test-0:8.0.45-1.el9_6.tuxcare.els1.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Moderate" }, { "category": "impact", "details": "Not affected. Oracle’s January 2026 advisory and the NVD specify CVE‑2026‑21950 impacts MySQL Server 9.0.0–9.5.0 (Server: Optimizer) only; MySQL 8.0.x is not listed as affected. The environment runs MySQL 8.0.43 (and the TuxCare 9.6 ESU channel provides 8.0.44), both outside the affected range, so the 9.x‑only optimizer code paths required to trigger this DoS are not present.", "product_ids": [ "AlmaLinux-9.6:mysql-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-common-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-common-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-devel-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-devel-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-errmsg-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-errmsg-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-libs-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-libs-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-server-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-server-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "AlmaLinux-9.6:mysql-test-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "AlmaLinux-9.6:mysql-test-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-common-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-common-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-devel-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-devel-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-errmsg-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-errmsg-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-libs-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-libs-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-server-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-server-0:8.0.45-1.el9_6.tuxcare.els1.x86_64", "Rocky Linux-9.6:mysql-test-0:8.0.44-1.el9_6.tuxcare.els2.x86_64", "Rocky Linux-9.6:mysql-test-0:8.0.45-1.el9_6.tuxcare.els1.x86_64" ] } ] } ] }