What is CVE-2021-39675?

CVE-2021-39675 is a critical-severity vulnerability in Google Android, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-02-11.

How severe is CVE-2021-39675?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-39675 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Google Android

CVE-2021-39675

In GKI_getbuf of gki_buffer.cc, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-12Android ID: A-205729183

Vulnerability class: Buffer Overflow

Published 2022-02-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.059 (93.1th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.059 · newest: 0.059 · change: 0.000

Affected products

Google Android — versions 12.0
Android — versions Android-12

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

source.android.com/security/bulletin/2022-02-01 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-39675?: CVE-2021-39675 is a critical-severity vulnerability in Google Android, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-02-11.
How severe is CVE-2021-39675?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-39675 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.