Use of Expired File Descriptor The advisory has been revoked - it doesn't affect any version of package kernel-modules-extra-matched (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-KERNELMODULESEXTRAMATCHED-14194752
- published6 Dec 2025
- disclosed4 Dec 2025
Introduced: 4 Dec 2025
CVE-2025-40249 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-modules-extra-matched package and not the kernel-modules-extra-matched package as distributed by RHEL.
In the Linux kernel, the following vulnerability has been resolved:
gpio: cdev: make sure the cdev fd is still active before emitting events
With the final call to fput() on a file descriptor, the release action may be deferred and scheduled on a work queue. The reference count of that descriptor is still zero and it must not be used. It's possible that a GPIO change, we want to notify the user-space about, happens AFTER the reference count on the file descriptor associated with the character device went down to zero but BEFORE the .release() callback was called from the workqueue and so BEFORE we unregistered from the notifier.
Using the regular get_file() routine in this situation triggers the following warning:
struct file::f_count incremented from zero; use-after-free condition present!
So use the get_file_active() variant that will return NULL on file descriptors that have been or are being released.