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.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*

No data.

References
Link Providers
https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba cve-icon cve-icon
https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb cve-icon cve-icon
https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5e cve-icon cve-icon
https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739 cve-icon cve-icon
https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892 cve-icon cve-icon
https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1 cve-icon cve-icon
https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8 cve-icon cve-icon
https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2021-47500 cve-icon
https://www.cve.org/CVERecord?id=CVE-2021-47500 cve-icon
History

Mon, 06 Jan 2025 21:15:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
Metrics cvssV3_1

{'score': 5.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H'}

 cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Wed, 11 Sep 2024 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2024-12-19T07:43:39.544Z

Reserved: 2024-05-22T06:20:56.204Z

Link: CVE-2021-47500

cve-icon Vulnrichment

Updated: 2024-08-04T05:39:59.752Z

cve-icon NVD

Status : Analyzed

Published: 2024-05-24T15:15:09.900

Modified: 2025-01-06T20:45:22.063

Link: CVE-2021-47500

cve-icon Redhat

Severity : Moderate

Publid Date: 2024-05-24T00:00:00Z

Links: CVE-2021-47500 - Bugzilla