7.8

CVE-2021-47500

iio: mma8452: Fix trigger reference couting

In the Linux kernel, the following vulnerability has been resolved:

iio: mma8452: Fix trigger reference couting

The mma8452 driver directly assigns a trigger to the struct iio_dev. The
IIO core when done using this trigger will call `iio_trigger_put()` to drop
the reference count by 1.

Without the matching `iio_trigger_get()` in the driver the reference count
can reach 0 too early, the trigger gets freed while still in use and a
use-after-free occurs.

Fix this by getting a reference to the trigger before assigning it to the
IIO device.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.2 < 4.4.295
Linux ≫ Linux Kernel Version >= 4.5 < 4.9.293
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.258
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.221
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.165
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.85
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.8
Linux ≫ Linux Kernel Version5.15 Updaterc1
Linux ≫ Linux Kernel Version5.15 Updaterc2
Linux ≫ Linux Kernel Version5.15 Updaterc3
Linux ≫ Linux Kernel Version5.15 Updaterc4
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.24% 0.151
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-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba
Patch
https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb
Patch
https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5e
Patch
https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739
Patch
https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892
Patch
https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1
Patch
https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8
Patch
https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96
Patch