In all Qualcomm products with Android releases from CAF using the Linux kernel, user controlled variables "nr_cmds" and "nr_bos" number are passed across functions without any check. An integer overflow to buffer overflow (with a smaller buffer allocated) may occur when they are too large or negative.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://source.android.com/security/bulletin/2017-09-01 | patch vendor advisory |
| http://www.securityfocus.com/bid/100658 | vdb entry third party advisory |