Linux Kernel up to 7.2-rc5 idxd idxd_cdev_open deadlock

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.48

Summaryinfo

A vulnerability categorized as problematic has been discovered in Linux Kernel up to 6.6.150/6.12.102/6.18.43/7.1.7/7.2-rc5. This vulnerability affects the function idxd_cdev_open of the component idxd. The manipulation results in deadlock. This vulnerability was named CVE-2026-74574. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 6.6.150/6.12.102/6.18.43/7.1.7/7.2-rc5. Affected is the function idxd_cdev_open of the component idxd. The manipulation with an unknown input leads to a deadlock vulnerability. CWE is classifying the issue as CWE-833. The product contains multiple threads or executable segments that are waiting for each other to release a necessary lock, resulting in deadlock. This is going to have an impact on integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev_open() The failed_dev_add and failed_dev_name paths drop the file-device reference while wq->wq_lock is still held. If put_device(fdev) drops the last reference, idxd_file_dev_release() runs synchronously and tries to take wq->wq_lock again, deadlocking. Those paths also fall through into the later ctx cleanup labels even though idxd_file_dev_release() owns that cleanup and frees ctx. This can make idxd_xa_pasid_remove(ctx) and kfree(ctx) operate on a freed context. Move idxd_wq_get() before file-device setup can fail, since the release callback always calls idxd_wq_put(). Then unlock wq->wq_lock before put_device(fdev) and return directly from the file-device setup failure path, leaving ctx cleanup to the release callback.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-74574 since 08/15/2026. The exploitability is told to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available.

Upgrading to version 6.6.151, 6.12.103, 6.18.44, 7.1.8 or 7.2-rc6 eliminates this vulnerability. Applying the patch 778ccbded2c8749c5be7f0dfa04fc9977a36fb7e/8d5d28285728be47c82fdf1c48be4268293c90e7/0679c0c189d2548f00e1bac95be28e2df5c6c7f7/6e26a41c4c1a706edaaa7c7dffc6b3b945707a55/ee1d7274102285d78a53161fc705a8d8cd40b066 is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-59639). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Deadlock
CWE: CWE-833 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.151/6.12.103/6.18.44/7.1.8/7.2-rc6
Patch: 778ccbded2c8749c5be7f0dfa04fc9977a36fb7e/8d5d28285728be47c82fdf1c48be4268293c90e7/0679c0c189d2548f00e1bac95be28e2df5c6c7f7/6e26a41c4c1a706edaaa7c7dffc6b3b945707a55/ee1d7274102285d78a53161fc705a8d8cd40b066

Timelineinfo

08/15/2026 Advisory disclosed
08/15/2026 +0 days CVE reserved
08/15/2026 +0 days VulDB entry created
08/15/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-74574 (🔒)
GCVE (CVE): GCVE-0-2026-74574
GCVE (VulDB): GCVE-100-390888
EUVD: 🔒

Entryinfo

Created: 08/15/2026 16:02
Updated: 08/15/2026 18:44
Changes: 08/15/2026 16:02 (59), 08/15/2026 18:44 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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