CVE-2026-64529

Description

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.

Gravité et risque d'exploitation

CVE-2026-64529 obtient un score CVSS de 7.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.18 %, ce qui la place devant 7.4 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions <=6.1.*, <=7.0.*, <de2cc38489b629927910b1aeff69bba7bd5c6f1b, <=6.12.*, 6.6.144, 5.15.211, 7.0.14, 0, <1de076f43e64bf65fbe7280a269c70e0e60518df, <=7.1.*, 5.10.260, <=5.10.*, <=6.6.*, 6.12.95, 7.1.2, 6.18.37, <=6.18.*, <a4999664a5ef77bdb0c6e6b935f581ac8ce6b63a, <d237230728c567297f2f98b425d63156ab2ed17f, 6.1.177, <=*, <071590a44cbc38483fceb1ab943363ec26868e1b, <b1ea97076bd0a5196290deba172034e480646727, <=5.15.*, d8cba25d2c68992a6e7c1d329b690a9ebe01167d, <3.17, <3ae49dd04dbb11fb73f17f58a982dba128abe83a, 3.17, 7.2, <b8ebf008696de1ec08c90d51f94d7e40bd448be1, <6848a6e39cac44fdb7cb88f0f777df62172d1551) est présent sur votre parc.
• Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
• À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
• Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

• 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