---
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:

  mysqld --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: 0.00129
epssPercentile: 0.02078
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-15T14:19:58.334730Z'
ingestedAt: '2026-09-15T08:34:10.546Z'
---

## Overview

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:
mysqld --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.

A 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.

When 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **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)
- **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)