CVE-2026-75092— Leapp 9to10 插件加载权限漏洞
一分钟漏洞结论
影响对象
Red Hat Red Hat Enterprise Linux 8
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
权限提升漏洞：在 提供的 包的 actor 中发现了权限提升漏洞。 在从 RHEL 9 升级到 RHEL 10 的过程中，该 actor 会以 root 身份在 Leapp actor 上下文中直接运行： 这一操作绕过了通常以 身份启动守护进程的标准 MySQL systemd 单元。 攻击路径： 以 OS 身份被攻陷的进程可以向 （该目录由 用户所有）写入： - 一个 version-2 的持久化配置文件（ ）； - 一个恶意的共享对象（shared object）。 该持久化配置可以将 设置为 ，并设置 （或相
可能的 ATT&CK 技术 1 AI
T1068 · Exploitation for Privilege Escalation
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一、 漏洞 CVE-2026-75092 基础信息
漏洞信息
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Vulnerability Title
Leapp-repository: leapp-upgrade-el9toel10: leapp-upgrade-el9toel10: scan_mysql runs mysqld --validate-config as root and can load mysql-writable plugins
来源: CVE Program / CVE List V5
Vulnerability 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:
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.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
带着不必要的权限执行
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 8 | - |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 | - |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenStack Platform 17.1 | - |
cpe:/a:redhat:openstack:17.1
|
|
二、漏洞 CVE-2026-75092 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-75092 补丁与修复 (1)
CVE-2026-75092 其他参考 (3)
同批安全公告 · Red Hat · 2026-09-15 · 共 3 条
| CVE-2026-81303 | 6.3 MEDIUM | hawtio-operator 自定义路由混淆代理人漏洞 |
| CVE-2026-81320 | 5.5 MEDIUM | Hawtio-operator 调试日志泄露TLS私钥 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-75092
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