CVE-2017-8246
HighSummary
In function msm_pcm_playback_close() in all Android releases from CAF using the Linux kernel, prtd is assigned substream->runtime->private_data. Later, prtd is freed but not sanitized or set to NULL, resulting in a dangling pointer.
Risk Assessment
The use of freed memory by other functions may lead to unpredictable system behavior, posing a risk to the stability and security of applications.
Recommendation
It is recommended to update to the latest kernel version that addresses this issue and to conduct a code review to ensure proper pointer sanitization.
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Original NVD description (English source)
In function msm_pcm_playback_close() in all Android releases from CAF using the Linux kernel, prtd is assigned substream->runtime->private_data. Later, prtd is freed. However, prtd is not sanitized and set to NULL, resulting in a dangling pointer. There are other functions that access the same memory (substream->runtime->private_data) with a NULL check, such as msm_pcm_volume_ctl_put(), which means this freed memory could be used.