Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2021-47063

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
29/02/2024
Last modified:
10/12/2024

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> drm: bridge/panel: Cleanup connector on bridge detach<br /> <br /> If we don&amp;#39;t call drm_connector_cleanup() manually in<br /> panel_bridge_detach(), the connector will be cleaned up with the other<br /> DRM objects in the call to drm_mode_config_cleanup(). However, since our<br /> drm_connector is devm-allocated, by the time drm_mode_config_cleanup()<br /> will be called, our connector will be long gone. Therefore, the<br /> connector must be cleaned up when the bridge is detached to avoid<br /> use-after-free conditions.<br /> <br /> v2: Cleanup connector only if it was created<br /> <br /> v3: Add FIXME<br /> <br /> v4: (Use connector-&gt;dev) directly in if() block

Impact

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

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.13 (including) 5.10.37 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.11.21 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.12 (including) 5.12.4 (excluding)

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


References to Advisories, Solutions, and Tools