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Vulnerability record · CVE-2022-50499 · published 4 October 2025

CVE-2022-50499: Linux kernel double free vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.16% · top 95.1% CWE-415 · Double free
7.8CVSS 3.1 base score
0.16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
9References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/0588b12c418c3e4f927ced11f27b02ef4a5bfb07 Patch
https://git.kernel.org/stable/c/123eddf92a114e03919942641d2c2b1f4ca56ea6 Patch
https://git.kernel.org/stable/c/6b0d0477fce747d4137aa65856318b55fba72198 Patch
https://git.kernel.org/stable/c/70bc51303871159796b55ba1a8f16637b46c2511 Patch
https://git.kernel.org/stable/c/772892b29ac50c2c5e918fc80104aa6ede81d837 Patch
https://git.kernel.org/stable/c/7dd5a68cdbbbe7fc67ba701cb52ba10d8ba149f8 Patch
https://git.kernel.org/stable/c/acf984a3718c2458eb9e08b6714490a04f213c58 Patch
https://git.kernel.org/stable/c/b21f62b49ee9c3e0216d685d9cfd6003e5727271 Patch
https://git.kernel.org/stable/c/e9a78485b658361fab6a5547377be6c1af6f1b3d Patch

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Source: NIST National Vulnerability Database (record CVE-2022-50499), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.