High

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

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.

Published Jul 25, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Linux

CVSS base

7.8

High · 2 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ d8cba25d2c68992a6e7c1d329b690a9ebe01167d and < 071590a44cbc38483fceb1ab943363ec26868e1b≥ d8cba25d2c68992a6e7c1d329b690a9ebe01167d and < 1de076f43e64bf65fbe7280a269c70e0e60518df≥ d8cba25d2c68992a6e7c1d329b690a9ebe01167d and < a4999664a5ef77bdb0c6e6b935f581ac8ce6b63a≥ d8cba25d2c68992a6e7c1d329b690a9ebe01167d and < 6848a6e39cac44fdb7cb88f0f777df62172d1551≥ d8cba25d2c68992a6e7c1d329b690a9ebe01167d and < b1ea97076bd0a5196290deba172034e480646727≥ d8cba25d2c68992a6e7c1d329b690a9ebe01167d and < b8ebf008696de1ec08c90d51f94d7e40bd448be1≥ d8cba25d2c68992a6e7c1d329b690a9ebe01167d and < de2cc38489b629927910b1aeff69bba7bd5c6f1b≥ d8cba25d2c68992a6e7c1d329b690a9ebe01167d and < 3ae49dd04dbb11fb73f17f58a982dba128abe83a and 2 more ≥ d8cba25d2c68992a6e7c1d329b690a9ebe01167d and < d237230728c567297f2f98b425d63156ab2ed17fversion 3.17	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.8	CVSS 3.1	High	1.8	5.9	416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database
7.8	CVSS 3.1	High	—	—	Linux via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (score shown at the top: 416baaa9-dc9f-4396-8d5f-8c081fb06d67)

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.

endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 7.8
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Jul 25, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

9 on the record

git.kernel.org/stable/c/6848a6e39cac44fdb7cb88f0f777df62172d1551
NIST National Vulnerability Database
git.kernel.org/stable/c/b1ea97076bd0a5196290deba172034e480646727
NIST National Vulnerability Database
git.kernel.org/stable/c/1de076f43e64bf65fbe7280a269c70e0e60518df
NIST National Vulnerability Database
git.kernel.org/stable/c/3ae49dd04dbb11fb73f17f58a982dba128abe83a
NIST National Vulnerability Database
git.kernel.org/stable/c/de2cc38489b629927910b1aeff69bba7bd5c6f1b
NIST National Vulnerability Database
git.kernel.org/stable/c/a4999664a5ef77bdb0c6e6b935f581ac8ce6b63a
NIST National Vulnerability Database
git.kernel.org/stable/c/071590a44cbc38483fceb1ab943363ec26868e1b
NIST National Vulnerability Database
git.kernel.org/stable/c/d237230728c567297f2f98b425d63156ab2ed17f
NIST National Vulnerability Database
git.kernel.org/stable/c/b8ebf008696de1ec08c90d51f94d7e40bd448be1
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 12h
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 12h
Unknown CVE-2026-98430 RDMA/efa: Keep admin queues alive while IRQ is registered 1d
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-64529 is "crypto: qat - remove unused character device and IOCTLs", rated High. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.8 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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