Unrated severityOSV Advisory· Published Jan 20, 2026· Updated Jan 21, 2026
CVE-2026-21968
CVE-2026-21968
Description
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and 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).
Affected products
40- Range: >=8.0.0 <=8.0.44, >=8.4.0 <=8.4.7, >=9.0.0 <=9.5.0
- osv-coords38 versionspkg:rpm/almalinux/galerapkg:rpm/almalinux/Judypkg:rpm/almalinux/mariadbpkg:rpm/almalinux/mariadb-backuppkg:rpm/almalinux/mariadb-commonpkg:rpm/almalinux/mariadb-develpkg:rpm/almalinux/mariadb-embeddedpkg:rpm/almalinux/mariadb-embedded-develpkg:rpm/almalinux/mariadb-errmsgpkg:rpm/almalinux/mariadb-gssapi-serverpkg:rpm/almalinux/mariadb-oqgraph-enginepkg:rpm/almalinux/mariadb-pampkg:rpm/almalinux/mariadb-serverpkg:rpm/almalinux/mariadb-server-galerapkg:rpm/almalinux/mariadb-server-utilspkg:rpm/almalinux/mariadb-testpkg:rpm/almalinux/mecabpkg:rpm/almalinux/mecab-develpkg:rpm/almalinux/mecab-ipadicpkg:rpm/almalinux/mecab-ipadic-EUCJPpkg:rpm/almalinux/mysqlpkg:rpm/almalinux/mysql8.4pkg:rpm/almalinux/mysql8.4-commonpkg:rpm/almalinux/mysql8.4-develpkg:rpm/almalinux/mysql8.4-errmsgpkg:rpm/almalinux/mysql8.4-libspkg:rpm/almalinux/mysql8.4-serverpkg:rpm/almalinux/mysql8.4-testpkg:rpm/almalinux/mysql8.4-test-datapkg:rpm/almalinux/mysql-commonpkg:rpm/almalinux/mysql-develpkg:rpm/almalinux/mysql-errmsgpkg:rpm/almalinux/mysql-libspkg:rpm/almalinux/mysql-serverpkg:rpm/almalinux/mysql-testpkg:rpm/almalinux/mysql-test-datapkg:rpm/almalinux/rapidjson-develpkg:rpm/almalinux/rapidjson-doc
< 26.4.23-1.module_el8.10.0+4152+4d93c53f+ 37 more
- (no CPE)range: < 26.4.23-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 1.0.5-18.module_el8.10.0+3794+c6a66d65
- (no CPE)range: < 3:10.11.15-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 3:10.11.15-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 3:10.11.15-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 3:10.11.15-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 3:10.11.15-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 3:10.11.15-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 3:10.11.15-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 3:10.11.15-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 3:10.11.15-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 3:10.11.15-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 3:10.11.15-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 3:10.11.15-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 3:10.11.15-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 3:10.11.15-1.module_el8.10.0+4152+4d93c53f
- (no CPE)range: < 0.996-2.module_el8.10.0+3965+b415b607
- (no CPE)range: < 0.996-2.module_el8.6.0+3340+d764b636
- (no CPE)range: < 2.7.0.20070801-17.module_el8.10.0+3965+b415b607
- (no CPE)range: < 2.7.0.20070801-17.module_el8.10.0+3965+b415b607
- (no CPE)range: < 8.0.45-1.el9_7
- (no CPE)range: < 8.4.8-1.el10_1
- (no CPE)range: < 8.4.8-1.el10_1
- (no CPE)range: < 8.4.8-1.el10_1
- (no CPE)range: < 8.4.8-1.el10_1
- (no CPE)range: < 8.4.8-1.el10_1
- (no CPE)range: < 8.4.8-1.el10_1
- (no CPE)range: < 8.4.8-1.el10_1
- (no CPE)range: < 8.4.8-1.el10_1
- (no CPE)range: < 8.0.45-1.el9_7
- (no CPE)range: < 8.0.45-1.el9_7
- (no CPE)range: < 8.0.45-1.el9_7
- (no CPE)range: < 8.0.45-1.el9_7
- (no CPE)range: < 8.0.45-1.el9_7
- (no CPE)range: < 8.0.45-1.el9_7
- (no CPE)range: < 8.4.8-1.module_el9.7.0+219+aca48cd3
- (no CPE)range: < 1.1.0-19.module_el9.6.0+152+8cbce00c
- (no CPE)range: < 1.1.0-19.module_el9.6.0+152+8cbce00c
Patches
Vulnerability mechanics
References
1- www.oracle.com/security-alerts/cpujan2026.htmlmitrevendor-advisory
News mentions
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