CVE - CVE-2021-47500

CVE-ID
CVE-2021-47500	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba URL:https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba MISC:https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb URL:https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb MISC:https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5e URL:https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5e MISC:https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739 URL:https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739 MISC:https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892 URL:https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892 MISC:https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1 URL:https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1 MISC:https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8 URL:https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8 MISC:https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96 URL:https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96
Assigning CNA
kernel.org
Date Record Created
20240522	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240522)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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