High 7.8Published Jul 25, 2026

CVE-2026-64529crypto: qat - remove unused character device and IOCTLs

Updated under an hour ago (Oct 27, 2026, 5:00 AM ET)

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-489
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from d8cba25d2c68992a6e7c1d329b690a9ebe01167d before 071590a44cbc38483fceb1ab943363ec26868e1b; from d8cba25d2c68992a6e7c1d329b690a9ebe01167d before 1de076f43e64bf65fbe7280a269c70e0e60518df; from d8cba25d2c68992a6e7c1d329b690a9ebe01167d before a4999664a5ef77bdb0c6e6b935f581ac8ce6b63a; from d8cba25d2c68992a6e7c1d329b690a9ebe01167d before 6848a6e39cac44fdb7cb88f0f777df62172d1551; from d8cba25d2c68992a6e7c1d329b690a9ebe01167d before b1ea97076bd0a5196290deba172034e480646727; from d8cba25d2c68992a6e7c1d329b690a9ebe01167d before b8ebf008696de1ec08c90d51f94d7e40bd448be1; from d8cba25d2c68992a6e7c1d329b690a9ebe01167d before de2cc38489b629927910b1aeff69bba7bd5c6f1b; from d8cba25d2c68992a6e7c1d329b690a9ebe01167d before 3ae49dd04dbb11fb73f17f58a982dba128abe83a; and 1 more ranges	CNA record

References

References

https://git.kernel.org/stable/c/071590a44cbc38483fceb1ab943363ec26868e1b
https://git.kernel.org/stable/c/1de076f43e64bf65fbe7280a269c70e0e60518df
https://git.kernel.org/stable/c/a4999664a5ef77bdb0c6e6b935f581ac8ce6b63a
https://git.kernel.org/stable/c/6848a6e39cac44fdb7cb88f0f777df62172d1551
https://git.kernel.org/stable/c/b1ea97076bd0a5196290deba172034e480646727
https://git.kernel.org/stable/c/b8ebf008696de1ec08c90d51f94d7e40bd448be1
https://git.kernel.org/stable/c/de2cc38489b629927910b1aeff69bba7bd5c6f1b
https://git.kernel.org/stable/c/3ae49dd04dbb11fb73f17f58a982dba128abe83a
https://git.kernel.org/stable/c/d237230728c567297f2f98b425d63156ab2ed17f

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.