CVE-2017-8246 - In function msm_pcm_playback_close() in all Android releases from CAF using the Linux kernel, prtd i

CVE-2017-8246

Summary

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

https://source.android.com/security/bulletin/2017-07-01
https://www.codeaurora.org/use-after-free-alsa-pcm-playback-kernel-module-cve-2017-8246

Vulnerable Configurations

cpe:2.3:o:google:android:-:*:*:*:*:*:*:*
cpe:2.3:o:google:android:-:*:*:*:*:*:*:*

CVSS

Base:	4.6 (as of 09-11-2020 - 14:17)
Impact:
Exploitability:

CWE

CWE-416

CAPEC

Access

Vector	Complexity	Authentication
LOCAL	LOW	NONE

Impact

Confidentiality	Integrity	Availability
PARTIAL	PARTIAL	PARTIAL

cvss-vector via4

AV:L/AC:L/Au:N/C:P/I:P/A:P

refmap via4

confirm

https://source.android.com/security/bulletin/2017-07-01
https://www.codeaurora.org/use-after-free-alsa-pcm-playback-kernel-module-cve-2017-8246

Last major update

09-11-2020 - 14:17

Published

12-05-2017 - 20:29

Last modified

09-11-2020 - 14:17