CVE-2026-64529

Status: UPDATED  |  Advisory ID: CVE-2026-64529

Key Details

Affected Products, Subsystems & Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

crypto: qat - remove unused character device and IOCTLs

The QAT driver exposes a character device (qat_adf_ctl) with IOCTLs

for device configuration, start, stop, status query and enumeration.

These IOCTLs are not part of any public uAPI header and have no known

in-tree or out-of-tree users. Device lifecycle is already managed via

sysfs.

The ioctl interface also increases the attack surface and is the

subject of a number of bug reports.

Remove the character device, the IOCTL definitions, and the related

data structures (adf_dev_status_info, adf_user_cfg_key_val,

adf_user_cfg_section, adf_user_cfg_ctl_data). Drop the now-unused

adf_cfg_user.h header and strip adf_ctl_drv.c down to the minimal

module_init/module_exit hooks for workqueue, AER, and crypto/compression

algorithm registration.

Clean up leftover dead code that was only reachable from the removed

IOCTL paths: adf_cfg_del_all(), adf_devmgr_verify_id(),

adf_devmgr_get_num_dev(), adf_devmgr_get_dev_by_id(),

adf_get_vf_real_id() and the unused ADF_CFG macros.

Additionally, drop the entry associated to QAT IOCTLs in

ioctl-number.rst. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References