Is CVE-2023-21403 actively exploited?

No active exploitation of CVE-2023-21403 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-21403 be exploited remotely?

Yes. CVE-2023-21403 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-21403?

CVE-2023-21403 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-21403

CRITICAL

CVE-2023-21403

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

9.8

CVSS v3.1

Official Description

In RGXDestroyZSBufferKM of rgxta3d.c, there is a possible arbitrary code execution due to an uncaught exception. 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

An uncaught exception in the kernel can lead to arbitrary code execution and local privilege escalation. The CVSS score of 9.8 highlights the critical nature of this vulnerability.

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

Recommended Action

Apply the latest Android security patches to mitigate this kernel-level risk.

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-2023-21403 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.