CVE-2021-25443 - Use After Free

Severity

53%

Complexity

18%

Confidentiality

56%

A use after free vulnerability in conn_gadget driver prior to SMR AUG-2021 Release 1 allows malicious action by an attacker.

CVSS 3.1 Base Score 5.3. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).

CVSS 2.0 Base Score 4.6. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:P/I:P/A:P).

Demo Examples

Use After Free

CWE-416

The following example demonstrates the weakness.


               
}
free(buf3R2);

Use After Free

CWE-416

The following code illustrates a use after free error:


               
}
free(ptr);
logError("operation aborted before commit", ptr);

When an error occurs, the pointer is immediately freed. However, this pointer is later incorrectly used in the logError function.

Overview

Type

Google Android

First reported 3 years ago

2021-08-05 20:15:00

Last updated 3 years ago

2021-08-12 17:30:00

Affected Software

Google Android 8.1

8.1

Google Android 9.0

9.0

Google Android 10.0

10.0

References

https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=8

https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=8

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