CVE-2021-46894 : Use After Free (UAF) vulnerability in the uinput module.Successful exploitation

Use After Free (UAF) vulnerability in the uinput module.Successful exploitation of this vulnerability may lead to kernel privilege escalation.

Published 2023-07-06 13:15:10

Updated 2023-07-12 19:04:53

Source Huawei Technologies

View at NVD, CVE.org

Vulnerability category: Memory CorruptionGain privilege

Products affected by CVE-2021-46894

Huawei » Harmonyos » Version: 2.0.0
cpe:2.3:o:huawei:harmonyos:2.0.0:*:*:*:*:*:*:*
Matching versions
Huawei » Emui » Version: 12.0.0
cpe:2.3:o:huawei:emui:12.0.0:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.27%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 68 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE-269 Improper Privilege Management

The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

Assigned by: psirt@huawei.com (Secondary)
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Assigned by: nvd@nist.gov (Primary)

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