{"id":"CVE-2026-75092","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-75092","summary":"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…","details":"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":"2026-09-15T09:16:43.727","modified":"2026-09-15T09:16:43.727","cvss":{"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"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/oamg/leapp-repository/commit/3e4cafffc8de1600a66519b326a407f37b665356","label":"oamg/leapp-repository@3e4caff"},"references":[{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-75092"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2517499"},{"type":"WEB","url":"https://github.com/oamg/leapp-repository"},{"type":"WEB","url":"https://github.com/oamg/leapp-repository/commit/3e4cafffc8de1600a66519b326a407f37b665356"},{"type":"WEB","url":"https://github.com/oamg/leapp-repository/pull/1343"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-15T09:16:43.727"}}