What is CVE-2018-11856?

CVE-2018-11856 is a high-severity vulnerability in Qualcomm Sd 835, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2018-10-29.

How severe is CVE-2018-11856?

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

Buffer overflow in Qualcomm Sd 835

CVE-2018-11856

Improper input validation leads to buffer overwrite in the WLAN function that handles WMI commands in Snapdragon Mobile in version SD 835, SD 845, SD 850.

Vulnerability class: Buffer Overflow

Published 2018-10-29 · 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: 0.003 (15.7th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Qualcomm Sd 835
Qualcomm Sd 835 Firmware
Qualcomm Sd 845
Qualcomm Sd 845 Firmware
Qualcomm Sd 850
Qualcomm Sd 850 Firmware
Qualcomm, Inc. Snapdragon Mobile — versions SD 835, SD 845, SD 850

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.qualcomm.com/company/product-security/bulletins (Vendor Advisory)
www.securityfocus.com/bid/107681 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-11856?: CVE-2018-11856 is a high-severity vulnerability in Qualcomm Sd 835, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2018-10-29.
How severe is CVE-2018-11856?: High severity. CVSS v3 base score is 7.8 out of 10.