Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: gpio: virtuser: fix missing lookup table cleanups When a virtuser device is created via configfs and the probe fails due to an incorrect lookup table, the table is not removed. This prevents subsequent probe attempts from succeeding, even if the issue is corrected, unless the device is released. Additionally, cleanup is also needed in the less likely case of platform_device_register_full() failure. Besides, a consistent memory leak in lookup_table->dev_id was spotted using kmemleak by toggling the live state between 0 and 1 with a correct lookup table. Introduce gpio_virtuser_remove_lookup_table() as the counterpart to the existing gpio_virtuser_make_lookup_table() and call it from all necessary points to ensure proper cleanup.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.11, < 6.12.10 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/a619cba8c69c434258ff4101d463322cd63e1bdcPatch
- https://git.kernel.org/stable/c/d72d0126b1f6981f6ce8b4247305f359958c11b5Patch
FAQ
What is CVE-2025-21661?
CVE-2025-21661 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: gpio: virtuser: fix missing lookup table cleanups When a virtuser device is created via configfs and the probe fails due to an inc...
How severe is CVE-2025-21661?
CVE-2025-21661 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-21661?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.