Is CVE-2021-0942 actively exploited?

No active exploitation of CVE-2021-0942 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-0942 be exploited remotely?

Yes. CVE-2021-0942 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-0942?

CVE-2021-0942 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-0942

CRITICAL

CVE-2021-0942

CWE-125Published: September 13, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

The path in this case is a little bit convoluted. The end result is that via an ioctl an untrusted app can control the ui32PageIndex offset in the expression:sPA.uiAddr = page_to_phys(psOSPageArrayData->pagearray[ui32PageIndex]);With the current PoC this crashes as an OOB read. However, given that the OOB read value is ending up as the address field of a struct I think i seems plausible that this could lead to an OOB write if the attacker is able to cause the OOB read to pull an interesting kernel address. Regardless if this is a read or write, it is a High severity issue in the kernel.Product: AndroidVersions: Android SoCAndroid ID: A-238904312

NVD Source

Risk Analysis

This vulnerability exists in the Android kernel and allows an untrusted application to trigger an out-of-bounds read via an ioctl call. Due to the potential for this to be leveraged into an out-of-bounds write, it is classified as a critical severity issue.

There is no known public exploit for this vulnerability, and it is not currently listed in the CISA KEV catalog.

Recommended Action

Users should apply the latest security patches provided by their Android device manufacturer to address kernel-level vulnerabilities.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-0942 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.