Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2021-46979

Severity CVSS v4.0:
Pending analysis
Type:
CWE-415 Double Free
Publication date:
28/02/2024
Last modified:
31/12/2024

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> iio: core: fix ioctl handlers removal<br /> <br /> Currently ioctl handlers are removed twice. For the first time during<br /> iio_device_unregister() then later on inside<br /> iio_device_unregister_eventset() and iio_buffers_free_sysfs_and_mask().<br /> Double free leads to kernel panic.<br /> <br /> Fix this by not touching ioctl handlers list directly but rather<br /> letting code responsible for registration call the matching cleanup<br /> routine itself.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.11.22 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.12 (including) 5.12.5 (excluding)
cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools