CVE-2017-8246
HIGHAndroid - Use-After-Free in ALSA PCM Playback Kernel Module
Title source: llmDescription
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.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_confirm
https://source.android.com/security/bulletin/2017-07-01
Broken Link x_refsource_confirm
https://www.codeaurora.org/use-after-free-alsa-pcm-playback-kernel-module-cve-2017-8246
Scores
CVSS v3
7.8
EPSS
0.0003
EPSS Percentile
9.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-416
Status
published
Products (2)
google/android
Qualcomm, Inc./Android for MSM, Firefox OS for MSM, QRD Android
All Android releases from CAF using the Linux kernel
Published
May 12, 2017
Tracked Since
Feb 18, 2026