{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-64529", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.794Z", "datePublished": "2026-07-25T09:24:18.750Z", "dateUpdated": "2026-08-17T04:57:06.789Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:57:06.789Z" }, "descriptions": [ { "lang": "en", "value": "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, 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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable interface is reached through local open and ioctl syscalls on /dev/qat_adf_ctl; it has no network or physical entry path.\nAC:L - The attacker can repeatedly invoke the start or status ioctl while coordinating QAT VF teardown in a hot-pluggable deployment, giving effective control over the race. A short ioctl loop has already produced the confirmed [KASAN use-after-free](https://www.spinics.net/lists/kernel/msg6034466.html ).\nPR:L - The driver performs no capability or credential check, so device-file permissions are the only gate. Standard QAT installation grants non-root qat-group members mode-0660 access to qat_adf_ctl according to the [Intel QAT installation guide](https://intel.github.io/quickassist/GSG/2.X/installation.html ).\nUI:N - Exploitation requires only attacker-generated ioctl calls and device-lifecycle operations, with no action by another user.\nS:U - The flaw compromises the same host or guest kernel security authority in which the vulnerable QAT driver executes; ordinary kernel privilege escalation does not change scope.\nC:H - The freed accel_dev can be reclaimed with attacker-influenced heap contents, and the status path follows stale pointers and invokes callbacks, providing a defensible route to arbitrary kernel-memory disclosure.\nI:H - Mutex operations and configuration paths write through the reclaimed object, while forged hw_device callbacks provide a plausible control-flow-hijack and arbitrary-kernel-write primitive.\nA:H - The UAF is confirmed to cause a KASAN kernel failure, and repeated malformed ioctls can independently create a printk storm leading to stalls, watchdog lockups, or panic." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "Documentation/userspace-api/ioctl/ioctl-number.rst", "drivers/crypto/intel/qat/qat_common/adf_cfg.c", "drivers/crypto/intel/qat/qat_common/adf_cfg.h", "drivers/crypto/intel/qat/qat_common/adf_cfg_common.h", "drivers/crypto/intel/qat/qat_common/adf_cfg_user.h", "drivers/crypto/intel/qat/qat_common/adf_common_drv.h", "drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c", "drivers/crypto/intel/qat/qat_common/adf_dev_mgr.c" ], "versions": [ { "version": "d8cba25d2c68992a6e7c1d329b690a9ebe01167d", "lessThan": "071590a44cbc38483fceb1ab943363ec26868e1b", "status": "affected", "versionType": "git" }, { "version": "d8cba25d2c68992a6e7c1d329b690a9ebe01167d", "lessThan": "1de076f43e64bf65fbe7280a269c70e0e60518df", "status": "affected", "versionType": "git" }, { "version": "d8cba25d2c68992a6e7c1d329b690a9ebe01167d", "lessThan": "a4999664a5ef77bdb0c6e6b935f581ac8ce6b63a", "status": "affected", "versionType": "git" }, { "version": "d8cba25d2c68992a6e7c1d329b690a9ebe01167d", "lessThan": "6848a6e39cac44fdb7cb88f0f777df62172d1551", "status": "affected", "versionType": "git" }, { "version": "d8cba25d2c68992a6e7c1d329b690a9ebe01167d", "lessThan": "b1ea97076bd0a5196290deba172034e480646727", "status": "affected", "versionType": "git" }, { "version": "d8cba25d2c68992a6e7c1d329b690a9ebe01167d", "lessThan": "b8ebf008696de1ec08c90d51f94d7e40bd448be1", "status": "affected", "versionType": "git" }, { "version": "d8cba25d2c68992a6e7c1d329b690a9ebe01167d", "lessThan": "de2cc38489b629927910b1aeff69bba7bd5c6f1b", "status": "affected", "versionType": "git" }, { "version": "d8cba25d2c68992a6e7c1d329b690a9ebe01167d", "lessThan": "3ae49dd04dbb11fb73f17f58a982dba128abe83a", "status": "affected", "versionType": "git" }, { "version": "d8cba25d2c68992a6e7c1d329b690a9ebe01167d", "lessThan": "d237230728c567297f2f98b425d63156ab2ed17f", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "Documentation/userspace-api/ioctl/ioctl-number.rst", "drivers/crypto/intel/qat/qat_common/adf_cfg.c", "drivers/crypto/intel/qat/qat_common/adf_cfg.h", "drivers/crypto/intel/qat/qat_common/adf_cfg_common.h", "drivers/crypto/intel/qat/qat_common/adf_cfg_user.h", "drivers/crypto/intel/qat/qat_common/adf_common_drv.h", "drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c", "drivers/crypto/intel/qat/qat_common/adf_dev_mgr.c" ], "versions": [ { "version": "3.17", "status": "affected" }, { "version": "0", "lessThan": "3.17", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.260", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.211", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.177", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.144", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.95", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.37", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.14", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.2", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.10.260" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.15.211" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.1.177" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.6.144" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.12.95" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.18.37" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "7.0.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "7.1.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "7.2" } ] } ] } ], "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" } ], "title": "crypto: qat - remove unused character device and IOCTLs", "x_generator": { "engine": "bippy-1.2.0" } } } }