CVE-2022-50499

HighCVSS 7.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-415

Affected software

VendorProductVersions
LinuxLinux>= 9db28659aa893c68f162b11fd63bb7f6a713e52f, < 0588b12c418c3e4f927ced11f27b02ef4a5bfb07; >= 1399a136127bfe1b9bb7c951d9851da62a519121, < e9a78485b658361fab6a5547377be6c1af6f1b3d; >= 4df2427a5148093987437054bb82da4d014dcd59, < 70bc51303871159796b55ba1a8f16637b46c2511; >= fcd5ce4b3936242e6679875a4d3c3acfc8743e15, < b21f62b49ee9c3e0216d685d9cfd6003e5727271; >= fcd5ce4b3936242e6679875a4d3c3acfc8743e15, < 7dd5a68cdbbbe7fc67ba701cb52ba10d8ba149f8; >= fcd5ce4b3936242e6679875a4d3c3acfc8743e15, < acf984a3718c2458eb9e08b6714490a04f213c58; >= fcd5ce4b3936242e6679875a4d3c3acfc8743e15, < 772892b29ac50c2c5e918fc80104aa6ede81d837; >= fcd5ce4b3936242e6679875a4d3c3acfc8743e15, < 123eddf92a114e03919942641d2c2b1f4ca56ea6; >= fcd5ce4b3936242e6679875a4d3c3acfc8743e15, < 6b0d0477fce747d4137aa65856318b55fba72198; 8c17f6f5d0d6aab72a2af25c9911ac66e984be06; 202be5d6e46f682b9d1d79cd4dc6ab726e62ef1c; >= 4.9.195, < 4.9.337; >= 4.14.147, < 4.14.303; >= 4.19.77, < 4.19.270; >= 5.2.19, < 5.3; >= 5.3.4, < 5.4
LinuxLinux5.4

References

Timeline

Published
Oct 4, 2025
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2022-50499: High severity, CVSS 7.8 | Vulnix