# CVE-2026-64529 — Linux

> As of 2026-07-25, CVE-2026-64529 is a vulnerability in Linux, EPSS 0.1% (9.5th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-64529 as of 2026-07-25; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-07-25

## What is CVE-2026-64529?

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.

1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 72 days ago.

## Severity and exploitation probability

- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 9.5% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 0.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-25

## Is CVE-2026-64529 being exploited?

It currently carries a trending score of 32 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Linux](https://intel.threadlinqs.com/vendors/linux): Linux

## How to fix CVE-2026-64529

No vendor patch reference has been recorded for CVE-2026-64529 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-64529

No threat campaign in the Threadlinqs corpus currently references CVE-2026-64529, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-07-26. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [git.kernel.org](https://git.kernel.org/stable/c/071590a44cbc38483fceb1ab943363ec26868e1b)
- [git.kernel.org (1de076f43e64bf65fbe7280a269c70e0e60518df)](https://git.kernel.org/stable/c/1de076f43e64bf65fbe7280a269c70e0e60518df)
- [git.kernel.org (a4999664a5ef77bdb0c6e6b935f581ac8ce6b63a)](https://git.kernel.org/stable/c/a4999664a5ef77bdb0c6e6b935f581ac8ce6b63a)
- [git.kernel.org (6848a6e39cac44fdb7cb88f0f777df62172d1551)](https://git.kernel.org/stable/c/6848a6e39cac44fdb7cb88f0f777df62172d1551)
- [git.kernel.org (b1ea97076bd0a5196290deba172034e480646727)](https://git.kernel.org/stable/c/b1ea97076bd0a5196290deba172034e480646727)

_Showing 5 of 9 recorded references._

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-64529
Full detection coverage and IOCs for threats exploiting CVE-2026-64529 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp