CVE-2025-68781 Affecting linux-6.1 package, versions <6.1.162-1~deb11u1
Threat Intelligence
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Test your applications- Snyk IDSNYK-DEBIAN11-LINUX61-15262844
- published11 Feb 2026
- disclosed13 Jan 2026
Introduced: 13 Jan 2026
CVE-2025-68781 (opens in a new tab)How to fix?
Upgrade Debian:11 linux-6.1 to version 6.1.162-1~deb11u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-6.1 package and not the linux-6.1 package as distributed by Debian.
See How to fix? for Debian:11 relevant fixed versions and status.
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:
- When a host controller binds to the OTG controller.
- 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.
References
- https://security-tracker.debian.org/tracker/CVE-2025-68781
- https://git.kernel.org/stable/c/2e7c47e2eb3cfeadf78a1ccbac8492c60d508f23
- https://git.kernel.org/stable/c/319f7a85b3c4e34ac2fe083eb146fe129a556317
- https://git.kernel.org/stable/c/41ca62e3e21e48c2903b3b45e232cf4f2ff7434f
- https://git.kernel.org/stable/c/4476c73bbbb09b13a962176fca934b32d3954a2e
- https://git.kernel.org/stable/c/69f9a0701abc3d1f8225074c56c27e6c16a37222