CVE-2026-64529

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> crypto: qat - remove unused character device and IOCTLs<br /> <br /> The QAT driver exposes a character device (qat_adf_ctl) with IOCTLs<br /> for device configuration, start, stop, status query and enumeration.<br /> These IOCTLs are not part of any public uAPI header and have no known<br /> in-tree or out-of-tree users. Device lifecycle is already managed via<br /> sysfs.<br /> <br /> The ioctl interface also increases the attack surface and is the<br /> subject of a number of bug reports.<br /> <br /> Remove the character device, the IOCTL definitions, and the related<br /> data structures (adf_dev_status_info, adf_user_cfg_key_val,<br /> adf_user_cfg_section, adf_user_cfg_ctl_data). Drop the now-unused<br /> adf_cfg_user.h header and strip adf_ctl_drv.c down to the minimal<br /> module_init/module_exit hooks for workqueue, AER, and crypto/compression<br /> algorithm registration.<br /> <br /> Clean up leftover dead code that was only reachable from the removed<br /> IOCTL paths: adf_cfg_del_all(), adf_devmgr_verify_id(),<br /> adf_devmgr_get_num_dev(), adf_devmgr_get_dev_by_id(),<br /> adf_get_vf_real_id() and the unused ADF_CFG macros.<br /> <br /> Additionally, drop the entry associated to QAT IOCTLs in<br /> ioctl-number.rst.