What is CVE-2018-9550?

CVE-2018-9550 is a high-severity vulnerability in Google Android, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2018-12-06.

How severe is CVE-2018-9550?

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

Buffer overflow in Google Android

CVE-2018-9550

In CAacDecoder_Init of aacdecoder.cpp, there is a possible out of bounds write due to a missing bounds check. This could lead to remote code execution with no additional execution privileges needed. User interaction is needed for exploitation. Product: Android. Versions: Android-9. Android ID: A-112660981.

Vulnerability class: Buffer Overflow

Published 2018-12-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (68.2th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Google Android — versions 9.0
Google Inc. Android — versions Android-9

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.securityfocus.com/bid/106137 (VDB Entry, Third Party Advisory, vdb-entry)
source.android.com/security/bulletin/2018-12-01 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2018-9550?: CVE-2018-9550 is a high-severity vulnerability in Google Android, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2018-12-06.
How severe is CVE-2018-9550?: High severity. CVSS v3 base score is 7.8 out of 10.