What is CVE-2023-21102?

CVE-2023-21102 is a high-severity vulnerability in Google Android, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.8/10. Published 2023-05-15.

How severe is CVE-2023-21102?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Google Android

CVE-2023-21102

In __efi_rt_asm_wrapper of efi-rt-wrapper.S, there is a possible bypass of shadow stack protection due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-260821414References: Upstream kernel

Published 2023-05-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (6.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 6.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Google Android
Android — versions Android kernel

Weakness classification (CWE)

CWE-754 — Improper Check for Unusual or Exceptional Conditions

References

source.android.com/security/bulletin/2023-05-01 (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2023-21102?: CVE-2023-21102 is a high-severity vulnerability in Google Android, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.8/10. Published 2023-05-15.
How severe is CVE-2023-21102?: High severity. CVSS v3 base score is 7.8 out of 10.