In the Linux kernel, the following vulnerability has been resolved:
usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal
The delayed work item otg_event is initialized in fsl_otg_conf() and scheduled under two conditions: 1. When a host controller binds to the OTG controller. 2. When the USB ID pin state changes (cable insertion/removal).
A race condition occurs when the device is removed via fsl_otg_remove(): the fsl_otg instance may be freed while the delayed work is still pending or executing. This leads to use-after-free when the work function fsl_otg_event() accesses the already freed memory.
The problematic scenario:
(detach thread) | (delayed work) fsl_otg_remove() | kfree(fsl_otg_dev) //FREE| fsl_otg_event() | og = container_of(...) //USE | og-> //USE
Fix this by calling disable_delayed_work_sync() in fsl_otg_remove() before deallocating the fsl_otg structure. This ensures the delayed work is properly canceled and completes execution prior to memory deallocation.
This bug was identified through static analysis.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linuxUpgrade linux-6.1 | Feb 11, 2026 | Feb 11, 2026 |
| Ubuntu | — | Upgrade linux-image-6.17.0-22-generic-64kUpgrade linux-image-oem-24.04cUpgrade linux-image-virtualUpgrade linux-image-oem-24.04aUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-gcpUpgrade linux-image-oem-24.04dUpgrade linux-image-6.17.0-1012-gcp-64kUpgrade linux-image-awsUpgrade linux-image-6.17.0-1012-aws-64kUpgrade linux-image-oracleUpgrade linux-image-gcp-64kUpgrade linux-image-oracle-6.17Upgrade linux-image-6.17.0-1010-realtimeUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-realtimeUpgrade linux-image-6.17.0-1011-oracleUpgrade linux-image-oem-6.17Upgrade linux-image-gcp-6.17Upgrade linux-image-oracle-64kUpgrade linux-image-raspi-6.17Upgrade linux-image-generic-64k-6.17Upgrade linux-image-realtime-6.17Upgrade linux-image-oracle-64k-6.17Upgrade linux-image-6.17.0-1013-azureUpgrade linux-image-aws-6.17Upgrade linux-image-6.17.0-1012-gcpUpgrade linux-image-6.17.0-1020-oemUpgrade linux-image-6.17.0-22-genericUpgrade linux-image-azureUpgrade linux-image-aws-64kUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-oem-24.04Upgrade linux-image-6.17.0-1012-awsUpgrade linux-image-6.17.0-1011-oracle-64kUpgrade linux-image-generic-6.17Upgrade linux-image-genericUpgrade linux-image-generic-64kUpgrade linux-image-6.17.0-1014-raspiUpgrade linux-image-virtual-6.17Upgrade linux-image-oem-24.04bUpgrade linux-image-gcp-64k-6.17Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-raspiUpgrade linux-image-azure-6.17Upgrade linux-image-aws-64k-6.17 | Apr 17, 2026 | Jan 13, 2026 |
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