Improper Update of Reference Count The advisory has been revoked - it doesn't affect any version of package kernel (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CENTOS9-KERNEL-7121260
- published27 May 2024
- disclosed24 May 2024
Introduced: 24 May 2024
CVE-2021-47500 (opens in a new tab)Amendment
The Centos security team deemed this advisory irrelevant for Centos:9.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Centos.
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