{"id":"CVE-2026-75092","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-75092","generatedAt":"2026-10-28T05:59:50.016Z","title":"A privilege escalation flaw was found in the scan_mysql actor of leapp-upgrade-el9toel10 (provided by leapp-repository).","description":"A privilege escalation flaw was found in the scan_mysql actor of leapp-upgrade-el9toel10 (provided by leapp-repository). During RHEL 9 to RHEL 10 upgrades, the actor runs:\nmysqld --validate-config --log-error-verbosity=2 directly as root in the Leapp actor context, bypassing the packaged MySQL systemd unit that normally starts the daemon as User=mysql.\n\nA process compromised as the mysql OS identity can write a version-2 persisted configuration (mysqld-auto.cnf) and a malicious shared object into /var/lib/mysql (a directory owned by mysql). That persisted map can set plugin_dir to /var/lib/mysql and early_plugin_load (or related loader options such as plugin_load / plugin_load_add) so MySQL loads the attacker-controlled object during configuration validation. Plugin loading can reach dlopen() before MySQL’s runtime-user check and before plugin-symbol validation.\n\nWhen an administrator subsequently runs the documented Leapp preupgrade or upgrade workflow, attacker-controlled code can execute as UID 0 with a full capability set in an unconfined SELinux domain (unconfined_t). The attack does not require write access to the default system plugin path under /usr; redirecting plugin_dir via mysql-owned persisted state is sufficient. Ordinary SQL privileges alone (including highly privileged SQL accounts) are not a sufficient startpoint — OS-level execution as the mysql service identity is required, plus later administrator invocation of Leapp.","published":"2026-09-15T09:16:44.000Z","lastModified":"2026-09-16T19:42:44.000Z","status":"Awaiting Analysis","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-250"],"affected":[],"epss":{"score":0.00188,"percentile":0.08322,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.19%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:67608","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:67609","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-75092","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2517499","source":"secalert@redhat.com"},{"url":"https://github.com/oamg/leapp-repository","source":"secalert@redhat.com"},{"url":"https://github.com/oamg/leapp-repository/commit/3e4cafffc8de1600a66519b326a407f37b665356","source":"secalert@redhat.com"},{"url":"https://github.com/oamg/leapp-repository/pull/1343","source":"secalert@redhat.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-75092","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}