CVE-2025-22097: drm/vkms: Fix use after free and double free on init error

Description

In the Linux kernel, the following vulnerability has been resolved:

drm/vkms: Fix use after free and double free on init error

If the driver initialization fails, the vkms_exit() function might
access an uninitialized or freed default_config pointer and it might
double free it.

Fix both possible errors by initializing default_config only when the
driver initialization succeeded.

Classification

CVE ID: CVE-2025-22097

Affected Products

Vendor: Linux

Product: Linux, Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.02% (probability of being exploited)

EPSS Percentile: 5.04% (scored less or equal to compared to others)

EPSS Date: 2025-04-20 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-22097
https://git.kernel.org/stable/c/49a69f67f53518bdd9b7eeebf019a2da6cc0e954
https://git.kernel.org/stable/c/79d138d137b80eeb0a83244d1cff29e64cf91067
https://git.kernel.org/stable/c/561fc0c5cf41f646f3e9e61784cbc0fc832fb936
https://git.kernel.org/stable/c/d5eb8e347905ab17788a7903fa1d3d06747355f5
https://git.kernel.org/stable/c/b8a18bb53e06d6d3c1fd03d12533d6e333ba8853
https://git.kernel.org/stable/c/1f68f1cf09d06061eb549726ff8339e064eddebd
https://git.kernel.org/stable/c/ed15511a773df86205bda66c37193569575ae828

Timeline