CVE-2021-39675

published 2022-02-11

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…

Priority P2 60 critical 9.8 CVSS 3.1

AV N AC L PR N UI N S U C H I H A H

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

Affected

4 ranges

Vendor	Product	Version range	Fixed in
google	android	—	—
google	android	—	—
google	android	—	—
platform	system_nfc	>= 12:0 < 12:2022-02-01	12:2022-02-01

Detection & IOCs extracted from sources · hover to see the quote

• → CVE-2021-39675 is a heap buffer overflow (out-of-bounds write) in GKI_getbuf() within gki_buffer.cc, enabling remote escalation of privilege on Android 12 with no user interaction required. ↗
• → The vulnerability is classified as a Critical Elevation of Privilege (EoP) affecting only Android 12 (AOSP), referenced under Android bug ID A-205729183. ↗
• → The vulnerability was patched in the Android February 2022 security bulletin; detection/response teams should verify Android 12 devices are patched to the 2022-02-01 security patch level or later. ↗

• · CVE-2021-39675 exclusively affects Android 12; no other AOSP versions are listed as impacted. ↗

CVSS provenance

nvd v3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 10.0 CRITICAL AV:N/AC:L/Au:N/C:C/I:C/A:C

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-787