What is CVE-2023-39408?

CVE-2023-39408 is a high-severity vulnerability in Huawei Emui, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2023-09-25.

How severe is CVE-2023-39408?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Huawei Emui

CVE-2023-39408

DoS vulnerability in the PMS module. Successful exploitation of this vulnerability may cause the system to restart.

Vulnerability class: Buffer Overflow

Published 2023-09-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (36.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.001

Affected products

Huawei Emui — versions 12.0.0, 12.0, 11.0.1
Huawei Harmonyos — versions 3.1.0, 3.0.0, 2.0.1

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

consumer.huawei.com/en/support/bulletin/2023/9/ (Vendor Advisory)
device.harmonyos.com/en/docs/security/update/security-bulletins-202309-00000016… (Vendor Advisory)

Frequently asked questions

What is CVE-2023-39408?: CVE-2023-39408 is a high-severity vulnerability in Huawei Emui, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2023-09-25.
How severe is CVE-2023-39408?: High severity. CVSS v3 base score is 7.5 out of 10.