What is CVE-2025-0303?

CVE-2025-0303 is a high-severity vulnerability in Openatom Openharmony, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2025-02-07.

How severe is CVE-2025-0303?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Openatom Openharmony

CVE-2025-0303

in OpenHarmony v4.1.2 and prior versions allow a local attacker cause the common permission is upgraded to root and sensitive information leak through buffer overflow.

Vulnerability class: Buffer Overflow

Published 2025-02-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (6.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 6.0% 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

Openatom Openharmony
Openharmony — versions v4.1.0

Weakness classification (CWE)

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

References

gitee.com/openharmony/security/blob/master/zh/security-disclosure/2025/2025-02… (Third Party Advisory)

Frequently asked questions

What is CVE-2025-0303?: CVE-2025-0303 is a high-severity vulnerability in Openatom Openharmony, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2025-02-07.
How severe is CVE-2025-0303?: High severity. CVSS v3 base score is 8.8 out of 10.