7.8

CVE-2022-50499

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

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.9.195 < 4.9.337
Linux ≫ Linux Kernel Version >= 4.14.147 < 4.14.303
Linux ≫ Linux Kernel Version >= 4.19.77 < 4.19.270
Linux ≫ Linux Kernel Version >= 5.2.19 < 5.3
Linux ≫ Linux Kernel Version >= 5.3.4 < 5.4.229
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.163
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.87
Linux ≫ Linux Kernel Version >= 5.16 < 6.0.18
Linux ≫ Linux Kernel Version >= 6.1 < 6.1.4
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.15% 0.048
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-415 Double Free

The product calls free() twice on the same memory address.

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