# CVE-2025-68781: usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal

CVE-2025-68781 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-68781, released January 13, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-68781
- Priority: High
- CVSS: 7.0 (Important)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 13, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-68781

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.69-1 | [DEBIAN-CVE-2025-68781](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68781.md) | Jan 13, 2026 |
| Linux | linux Debian 14 | 6.18.3-1 | [DEBIAN-CVE-2025-68781](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68781.md) | Jan 13, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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