Is CVE-2023-21216 actively exploited?

No active exploitation of CVE-2023-21216 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-21216 be exploited remotely?

Yes. CVE-2023-21216 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-21216?

CVE-2023-21216 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-21216

CRITICAL

CVE-2023-21216

NVD-CWE-noinfoPublished: December 4, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

In PMRChangeSparseMemOSMem of physmem_osmem_linux.c, there is a possible arbitrary code execution due to a use after free. This could lead to local escalation of privilege in the kernel with no additional execution privileges needed. User interaction is not needed for exploitation.

NVD Source

Risk Analysis

A use-after-free vulnerability in the kernel could allow for arbitrary code execution and local privilege escalation. This is a critical issue with a CVSS score of 9.8.

No public exploit is known, and it is not in the CISA KEV. It is remotely exploitable.

Recommended Action

Apply the latest Android security updates.

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-2023-21216 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.