What is CVE-2015-6640?

CVE-2015-6640 is a high-severity vulnerability in Google Android, classified under CWE-264. CVSS score: 7.8/10. Published 2016-01-06.

How severe is CVE-2015-6640?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2015-6640 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Google Android

CVE-2015-6640

The prctl_set_vma_anon_name function in kernel/sys.c in Android before 5.1.1 LMY49F and 6.0 before 2016-01-01 does not ensure that only one vma is accessed in a certain update action, which allows attackers to gain privileges or cause a denial of service (vma list corruption) via a crafted application, aka internal bug 20017123.

Published 2016-01-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (52.5th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Google Android — versions 4.4.4, 5.0, 5.1.1

Weakness classification (CWE)

CWE-264

Public proof-of-concept exploits

References

www.securitytracker.com/id/1034592 (vdb-entry)
source.android.com/security/bulletin/2016-01-01.html (Vendor Advisory)
android.googlesource.com/kernel/common/+/69bfe2d957d903521d32324190c2754cb073be…

Frequently asked questions

What is CVE-2015-6640?: CVE-2015-6640 is a high-severity vulnerability in Google Android, classified under CWE-264. CVSS score: 7.8/10. Published 2016-01-06.
How severe is CVE-2015-6640?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2015-6640 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.