What is CVE-2023-20623?

CVE-2023-20623 is a medium-severity vulnerability in Google Android, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.4/10. Published 2023-03-07.

How severe is CVE-2023-20623?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Vulnerability in Google Android

CVE-2023-20623

In ion, there is a possible escalation of privilege due to improper locking. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07559778; Issue ID: ALPS07559778.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

Published 2023-03-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (0.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 0th percentile — 0.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Google Android — versions 10.0, 11.0, 12.0
Mediatek Mt6580
Mediatek Mt6735
Mediatek Mt6737
Mediatek Mt6739
Mediatek Mt6753
Mediatek Mt6757
Mediatek Mt6757c
Mediatek Mt6757cd
Mediatek Mt6757ch

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

corp.mediatek.com/product-security-bulletin/March-2023 (Vendor Advisory)

Frequently asked questions

What is CVE-2023-20623?: CVE-2023-20623 is a medium-severity vulnerability in Google Android, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.4/10. Published 2023-03-07.
How severe is CVE-2023-20623?: Medium severity. CVSS v3 base score is 6.4 out of 10.