CVE-2025-21917: usb: renesas_usbhs: Flush the notify_hotplug_work
First published: Tue Apr 01 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: usb: renesas_usbhs: Flush the notify_hotplug_work When performing continuous unbind/bind operations on the USB drivers available on the Renesas RZ/G2L SoC, a kernel crash with the message "Unable to handle kernel NULL pointer dereference at virtual address" may occur. This issue points to the usbhsc_notify_hotplug() function. Flush the delayed work to avoid its execution when driver resources are unavailable.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=3.0<5.4.291 | |
| Linux Kernel | >=5.5<5.10.235 | |
| Linux Kernel | >=5.11<5.15.179 | |
| Linux Kernel | >=5.16<6.1.131 | |
| Linux Kernel | >=6.2<6.6.83 | |
| Linux Kernel | >=6.7<6.12.19 | |
| Linux Kernel | >=6.13<6.13.7 | |
| Linux Kernel | =6.14-rc1 | |
| Linux Kernel | =6.14-rc2 | |
| Linux Kernel | =6.14-rc3 | |
| Linux Kernel | =6.14-rc4 | |
| Linux Kernel | =6.14-rc5 |
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Reference Links
- https://git.kernel.org/stable/c/4cd847a7b630a85493d0294ad9542c21aafaa246
- https://git.kernel.org/stable/c/394965f90454d6f00fe11879142b720c6c1a872e
- https://git.kernel.org/stable/c/3248c1f833f924246cb98ce7da4569133c1b2292
- https://git.kernel.org/stable/c/4ca078084cdd5f32d533311d6a0b63a60dcadd41
- https://git.kernel.org/stable/c/d50f5c0cd949593eb9a3d822b34d7b50046a06b7
- https://git.kernel.org/stable/c/e5aac1c9b2974636db7ce796ffa6de88fa08335e
- https://git.kernel.org/stable/c/830818c8e70c0364e377f0c243b28061ef7967eb
- https://git.kernel.org/stable/c/552ca6b87e3778f3dd5b87842f95138162e16c82
Frequently Asked Questions
What is the severity of CVE-2025-21917?
CVE-2025-21917 has a medium severity rating due to potential kernel crashes.
How do I fix CVE-2025-21917?
To fix CVE-2025-21917, you should update your Linux kernel to the latest patched version.
What systems are affected by CVE-2025-21917?
CVE-2025-21917 affects the Linux kernel specifically on systems utilizing the Renesas RZ/G2L SoC.
What happens if CVE-2025-21917 is exploited?
If exploited, CVE-2025-21917 can lead to kernel crashes during continuous unbind/bind operations on USB drivers.
When was CVE-2025-21917 resolved?
CVE-2025-21917 was resolved in a recent update to the Linux kernel, addressing the kernel crash issue.
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