CVE-2022-50499 - CVE House
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Status published High CVE-2022-50499

media: dvb-core: Fix double free in dvb_register_device()

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
9db28659aa893c68f162b11fd63bb7f6a713e52f, 1399a136127bfe1b9bb7c951d9851da62a519121, 4df2427a5148093987437054bb82da4d014dcd59, fcd5ce4b3936242e6679875a4d3c3acfc8743e15, 8c17f6f5d0d6aab72a2af25c9911ac66e984be06, 202be5d6e46f682b9d1d79cd4dc6ab726e62ef1c, 4.9.195, 4.14.147, 4.19.77, 5.2.19, 5.3.4, 5.4, 0, 4.9.337, 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.87, 6.0.18, 6.1.4, 6.2

Timeline

Official Publish: October 4th, 2025
Last Modified: May 23rd, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.