What is CVE-2023-21666?

CVE-2023-21666 is a high-severity vulnerability in Qualcomm 8905, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 8.4/10. Published 2023-05-02.

How severe is CVE-2023-21666?

High severity. CVSS v3 base score is 8.4 out of 10.

Vulnerability in Qualcomm 8905

CVE-2023-21666

Memory Corruption in Graphics while accessing a buffer allocated through the graphics pool.

Published 2023-05-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (6.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 6.8% 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

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

www.qualcomm.com/company/product-security/bulletins/may-2023-bulletin (Patch, Vendor Advisory)
packetstormsecurity.com/files/172664/Qualcomm-Adreno-KGSL-Data-Leakage.html

Frequently asked questions

What is CVE-2023-21666?: CVE-2023-21666 is a high-severity vulnerability in Qualcomm 8905, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 8.4/10. Published 2023-05-02.
How severe is CVE-2023-21666?: High severity. CVSS v3 base score is 8.4 out of 10.