CVE-2023-21237 — Android Pixel Information Disclosure Vulnerability

In applyRemoteView of NotificationContentInflater.java, there is a possible way to hide foreground service notification due to misleading or insufficient UI. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not ne

01What is this vulnerability?

In applyRemoteView of NotificationContentInflater.java, there is a possible way to hide foreground service notification due to misleading or insufficient UI. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-251586912

02Affected products

Vendor	Product	Versions
n	a / Android	Android-13

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2024-03-05. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-06-28T00:00:00.000Z
• Last modified: 2025-10-21T23:05:44.154Z
• Added to CISA KEV: 2024-03-05
• BOD 22-01 due: 2024-03-26

09References

• source.android.com — https://source.android.com/security/bulletin/pixel/2023-06-01