What is CVE-2021-22465?

CVE-2021-22465 is a medium-severity vulnerability in Huawei Harmonyos, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2021-10-28.

How severe is CVE-2021-22465?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Huawei Harmonyos

CVE-2021-22465

A component of the HarmonyOS has a Heap-based Buffer Overflow vulnerability. Local attackers may exploit this vulnerability to cause Kernel System unavailable.

Vulnerability class: Buffer Overflow

Published 2021-10-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (3.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.6% 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

Huawei Harmonyos — versions 2.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

device.harmonyos.com/cn/docs/security/update/security-bulletins-202107-00000011… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-22465?: CVE-2021-22465 is a medium-severity vulnerability in Huawei Harmonyos, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2021-10-28.
How severe is CVE-2021-22465?: Medium severity. CVSS v3 base score is 5.5 out of 10.