{"id":"CVE-2026-64529","title":"crypto: qat - remove unused character device and IOCTLs","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: qat - remove unused character device and IOCTLs\n\nThe QAT driver exposes a character device (qat_adf_ctl) with IOCTLs\nfor device configuration, start, stop, stat…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < 071590a44cbc38483fceb1ab943363ec26868e1b","Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < 1de076f43e64bf65fbe7280a269c70e0e60518df","Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < a4999664a5ef77bdb0c6e6b935f581ac8ce6b63a","Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < 6848a6e39cac44fdb7cb88f0f777df62172d1551","Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < b1ea97076bd0a5196290deba172034e480646727","Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < b8ebf008696de1ec08c90d51f94d7e40bd448be1","Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < de2cc38489b629927910b1aeff69bba7bd5c6f1b","Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < 3ae49dd04dbb11fb73f17f58a982dba128abe83a","Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < d237230728c567297f2f98b425d63156ab2ed17f","Linux 3.17"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:41:41.952211Z"},"published":"2026-07-25","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:42:39.580Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64529","references":[{"url":"https://git.kernel.org/stable/c/071590a44cbc38483fceb1ab943363ec26868e1b"},{"url":"https://git.kernel.org/stable/c/1de076f43e64bf65fbe7280a269c70e0e60518df"},{"url":"https://git.kernel.org/stable/c/a4999664a5ef77bdb0c6e6b935f581ac8ce6b63a"},{"url":"https://git.kernel.org/stable/c/6848a6e39cac44fdb7cb88f0f777df62172d1551"},{"url":"https://git.kernel.org/stable/c/b1ea97076bd0a5196290deba172034e480646727"},{"url":"https://git.kernel.org/stable/c/b8ebf008696de1ec08c90d51f94d7e40bd448be1"},{"url":"https://git.kernel.org/stable/c/de2cc38489b629927910b1aeff69bba7bd5c6f1b"},{"url":"https://git.kernel.org/stable/c/3ae49dd04dbb11fb73f17f58a982dba128abe83a"},{"url":"https://git.kernel.org/stable/c/d237230728c567297f2f98b425d63156ab2ed17f"}],"tags":["cve.org"],"epss":0.00184,"epssPercentile":0.07407,"ingestedAt":"2026-10-16T17:24:46.828Z","slug":"CVE-2026-64529","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: qat - remove unused character device and IOCTLs\n\nThe QAT driver exposes a character device (qat_adf_ctl) with IOCTLs\nfor device configuration, start, stop, status query and enumeration.\nThese IOCTLs are not part of any public uAPI header and have no known\nin-tree or out-of-tree users. Device lifecycle is already managed via\nsysfs.\n\nThe ioctl interface also increases the attack surface and is the\nsubject of a number of bug reports.\n\nRemove the character device, the IOCTL definitions, and the related\ndata structures (adf_dev_status_info, adf_user_cfg_key_val,\nadf_user_cfg_section, adf_user_cfg_ctl_data). Drop the now-unused\nadf_cfg_user.h header and strip adf_ctl_drv.c down to the minimal\nmodule_init/module_exit hooks for workqueue, AER, and crypto/compression\nalgorithm registration.\n\nClean up leftover dead code that was only reachable from the removed\nIOCTL paths: adf_cfg_del_all(), adf_devmgr_verify_id(),\nadf_devmgr_get_num_dev(), adf_devmgr_get_dev_by_id(),\nadf_get_vf_real_id() and the unused ADF_CFG macros.\n\nAdditionally, drop the entry associated to QAT IOCTLs in\nioctl-number.rst.\n\n## Affected\n\n- `Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < 071590a44cbc38483fceb1ab943363ec26868e1b`\n- `Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < 1de076f43e64bf65fbe7280a269c70e0e60518df`\n- `Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < a4999664a5ef77bdb0c6e6b935f581ac8ce6b63a`\n- `Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < 6848a6e39cac44fdb7cb88f0f777df62172d1551`\n- `Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < b1ea97076bd0a5196290deba172034e480646727`\n- `Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < b8ebf008696de1ec08c90d51f94d7e40bd448be1`\n- `Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < de2cc38489b629927910b1aeff69bba7bd5c6f1b`\n- `Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < 3ae49dd04dbb11fb73f17f58a982dba128abe83a`\n- `Linux >= d8cba25d2c68992a6e7c1d329b690a9ebe01167d < d237230728c567297f2f98b425d63156ab2ed17f`\n- `Linux 3.17`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}