CVE-2025-21661

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.

• CWE-401
• CWE-401

• https://git.kernel.org/stable/c/a619cba8c69c434258ff4101d463322cd63e1bdcPatch
• https://git.kernel.org/stable/c/d72d0126b1f6981f6ce8b4247305f359958c11b5Patch

Published

Jan 21, 2025

Last Modified

Jul 30, 2026

Status

Modified

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