Improper Update of Reference Count Affecting kernel-devel package, versions *
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Test your applications- Snyk ID SNYK-CENTOS7-KERNELDEVEL-7144835
- published 27 May 2024
- disclosed 24 May 2024
How to fix?
There is no fixed version for Centos:7 kernel-devel.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-devel package and not the kernel-devel package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2021-47500
- https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba
- https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb
- https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5e
- https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739
- https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892
- https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1
- https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8
- https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96