CVE-2026-74367

Received Received - Intake

Memory Corruption in Linux Kernel WiFi ath12k Driver

Publication date: 2026-08-15

Last updated on: 2026-08-17

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: fix inconsistent arvif state in vdev_create error paths ath12k_mac_vdev_create() has three error path issues that leave arvif in an inconsistent state: 1. When ath12k_wmi_vdev_create() fails, the function returns directly without clearing arvif->ar, which was already set before the WMI call. Subsequent code checking arvif->ar to determine vdev readiness will see a non-NULL value despite no vdev existing in firmware. 2. When ath12k_wmi_send_peer_delete_cmd() fails in err_peer_del, the code jumped to err: skipping the DP peer cleanup and vdev rollback, leaving num_created_vdevs, vdev maps and arvif list membership live. 3. When ath12k_wait_for_peer_delete_done() fails, the code jumped to err_vdev_del: skipping the DP peer cleanup. Fix by changing the ath12k_wmi_vdev_create() failure to goto err instead of returning directly, routing both err_peer_del failure paths through err_dp_peer_del: for proper DP peer and vdev rollback, and consolidating the arvif state cleanup at err:. Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3

CVSS Scores

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Meta Information

Published

2026-08-15

Last Modified

2026-08-17

Generated

2026-09-04

AI Q&A

2026-08-15

EPSS Evaluated

2026-09-03

NVD

CVE-2026-74367

EUVD

EUVD-2026-59514

Affected Vendors & Products

Vendor	Product	Version / Range
qualcomm	ath12k	From 1.115823.3 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This is a Linux kernel vulnerability in the ath12k WiFi driver. It involves inconsistent state management in the vdev_create error paths. When errors occur during WiFi device creation, the driver fails to properly clean up resources, leaving the arvif structure in an invalid state. This can cause firmware to appear operational when it is not.

Detection Guidance

This vulnerability is specific to the Linux kernel's ath12k WiFi driver and requires kernel-level inspection. Detection involves checking for inconsistent arvif states or failed vdev creation in kernel logs. Commands like dmesg | grep ath12k or journalctl -k | grep ath12k may reveal errors. Ensure your kernel is updated to a patched version.

Impact Analysis

This vulnerability could lead to WiFi connectivity issues or crashes on systems using affected Qualcomm ath12k hardware. It may cause unexpected behavior when connecting to networks or during network operations due to the driver's inconsistent state.

Compliance Impact

This vulnerability does not directly affect compliance with standards like GDPR or HIPAA as it is a low-level Linux kernel issue in the ath12k WiFi driver. It causes inconsistent state in vdev creation error paths but does not involve data exposure or privacy violations.

Mitigation Strategies

Update the Linux kernel to a patched version that includes the fix for CVE-2026-74367. This resolves the inconsistent arvif state issues in the ath12k driver.

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