CVE-2017-15820 - Use After Free

Severity

72%

Complexity

39%

Confidentiality

165%

In all Qualcomm products with Android releases from CAF using the Linux kernel, in a KGSL IOCTL handler, a Use After Free Condition can potentially occur.

In all Qualcomm products with Android releases from CAF using the Linux kernel, in a KGSL IOCTL handler, a Use After Free Condition can potentially occur.

CVSS 3.0 Base Score 7.8. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 7.2. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:C/I:C/A:C).

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

First reported 6 years ago

2018-02-23 23:29:00

Last updated 6 years ago

2018-03-12 16:51:00

Affected Software

Google Android Operating System

References

102974

Third Party Advisory, VDB Entry

https://source.android.com/security/bulletin/2018-02-01

Vendor Advisory

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