CVE-2022-50499
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-04

Last updated on: 2025-10-06

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: media: dvb-core: Fix double free in dvb_register_device() In function dvb_register_device() -> dvb_register_media_device() -> dvb_create_media_entity(), dvb->entity is allocated and initialized. If the initialization fails, it frees the dvb->entity, and return an error code. The caller takes the error code and handles the error by calling dvb_media_device_free(), which unregisters the entity and frees the field again if it is not NULL. As dvb->entity may not NULLed in dvb_create_media_entity() when the allocation of dvbdev->pad fails, a double free may occur. This may also cause an Use After free in media_device_unregister_entity(). Fix this by storing NULL to dvb->entity when it is freed.
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Meta Information
Published
2025-10-04
Last Modified
2025-10-06
Generated
2026-05-07
AI Q&A
2025-10-04
EPSS Evaluated
2026-05-05
NVD
CVE-2022-50499
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a double free bug in the Linux kernel's media subsystem, specifically in the dvb-core component. In the function dvb_register_device(), an entity is allocated and initialized. If initialization fails, the entity is freed, but the pointer is not set to NULL. Later, the caller tries to free the entity again if it is not NULL, causing a double free. This can also lead to a Use After Free condition in media_device_unregister_entity(). The fix involves setting the entity pointer to NULL after it is freed to prevent double freeing.


How can this vulnerability impact me? :

This vulnerability can lead to memory corruption due to double free and use-after-free conditions. Exploiting this could cause system instability, crashes, or potentially allow an attacker to execute arbitrary code with kernel privileges, compromising system security.


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