Use After Free in Google Android
CVE-2017-8246
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (6.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 6.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Google Android
- Qualcomm, Inc. Android For Msm, Firefox OS Qrd — versions All Android releases from CAF using the Linux kernel
Weakness classification (CWE)
Public proof-of-concept exploits
References
- source.android.com/security/bulletin/2017-07-01 (Vendor Advisory)
- www.codeaurora.org/use-after-free-alsa-pcm-playback-kernel-module-cve-2017-8246 (Broken Link)
Frequently asked questions
- What is CVE-2017-8246?
- CVE-2017-8246 is a high-severity vulnerability in Google Android, classified under Use After Free. CVSS score: 7.8/10. Published 2017-05-12.
- How severe is CVE-2017-8246?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2017-8246 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.