What is CVE-2018-11840?

CVE-2018-11840 is a high-severity vulnerability in Google Android, classified under Double Free. CVSS score: 7.8/10. Published 2018-09-18.

How severe is CVE-2018-11840?

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

Double Free in Google Android

CVE-2018-11840

In all android releases (Android for MSM, Firefox OS for MSM, QRD Android) from CAF using the linux kernel, while processing the WLAN driver command ioctl a temporary buffer used to construct the reply message may be freed twice.

Vulnerability class: Double Free

Published 2018-09-18 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.002 (8.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.0% 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)

CWE-415 — Double Free

References

www.codeaurora.org/security-bulletin/2018/09/04/september-2018-code-aurora-secu… (Patch, Third Party Advisory)
source.codeaurora.org/quic/la/platform/vendor/qcom-opensource/wlan/qcacld-3.0/c… (Patch, Third Party Advisory)
www.securityfocus.com/bid/107770 (vdb-entry)

Frequently asked questions

What is CVE-2018-11840?: CVE-2018-11840 is a high-severity vulnerability in Google Android, classified under Double Free. CVSS score: 7.8/10. Published 2018-09-18.
How severe is CVE-2018-11840?: High severity. CVSS v3 base score is 7.8 out of 10.