{"id":"CVE-2026-75092","title":"A privilege escalation flaw was found in the scan_mysql actor of leapp-upgrade-el9toel10 (provided by leapp-repository)","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 --log-error-verbosity=2 directly as root…","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-250"],"vendor":"Red Hat","product":"leapp-repository","affected":["leapp-repository","leapp-repository (all versions)","leapp-repository-openstack"],"patched":["enterprise_linux_appstream_eus_v_9_6","enterprise_linux_appstream_v_9"],"published":"2026-09-15","updated":"2026-09-16","sourceUpdated":"2026-09-16T19:42:43.623","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-75092","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:67608","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:67609","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-75092","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2517499","label":"secalert@redhat.com"},{"url":"https://github.com/oamg/leapp-repository","label":"secalert@redhat.com"},{"url":"https://github.com/oamg/leapp-repository/commit/3e4cafffc8de1600a66519b326a407f37b665356","label":"secalert@redhat.com"},{"url":"https://github.com/oamg/leapp-repository/pull/1343","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-75092.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-75092"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-75092"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00128,"epssPercentile":0.02843,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-15T14:19:58.334730Z"},"ingestedAt":"2026-09-15T08:34:10.546Z","slug":"CVE-2026-75092","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:67609** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6) · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67609)\n- **RHSA-2026:67608** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67608)","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":40.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}