How severe is CVE-2023-21103?

CVE-2023-21103 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-21103 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-21103?

CVE-2023-21103 primarily affects Google Android. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-21103?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-21103 published?

CVE-2023-21103 was published on 2023-05-15 and last updated on 2026-06-17.

CVE-2023-21103

CVE-2023-21103 is a medium-severity vulnerability in Google Android with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-209.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-209
Affected product: Google Android
Published: 2023-05-15
Last modified: 2026-06-17

Description

In registerPhoneAccount of PhoneAccountRegistrar.java, uncaught exceptions in parsing persisted user data could lead to local persistent denial of service with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-12 Android-12L Android-13Android ID: A-259064622

Frequently asked questions

What is CVE-2023-21103?: In registerPhoneAccount of PhoneAccountRegistrar.java, uncaught exceptions in parsing persisted user data could lead to local persistent denial of service with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-12 Android-12L Android-13Android ID: A-259064622
How severe is CVE-2023-21103?: CVE-2023-21103 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-21103 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-21103?: CVE-2023-21103 primarily affects Google Android. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-21103?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-21103 published?: CVE-2023-21103 was published on 2023-05-15 and last updated on 2026-06-17.

References

https://source.android.com/security/bulletin/2023-05-01

Affected products (4)

cpe:2.3:o:google:android:11.0:*:*:*:*:*:*:*
cpe:2.3:o:google:android:12.0:*:*:*:*:*:*:*
cpe:2.3:o:google:android:12.1:*:*:*:*:*:*:*
cpe:2.3:o:google:android:13.0:*:*:*:*:*:*:*

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