How severe is CVE-2021-0387?

CVE-2021-0387 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-0387 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-2021-0387?

CVE-2021-0387 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-0387?

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

When was CVE-2021-0387 published?

CVE-2021-0387 was published on 2021-03-10 and last updated on 2026-06-17.

CVE-2021-0387

CVE-2021-0387 is a medium-severity vulnerability in Google Android with a CVSS 3.x base score of 6.4. 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-362.

Key facts

Severity: Medium (CVSS 3.x base score 6.4)
CVSS v2: 6.9
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-362
Affected product: Google Android
Published: 2021-03-10
Last modified: 2026-06-17

Description

In FindQuotaDeviceForUuid of QuotaUtils.cpp, there is a possible use-after-free due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-169421939

Frequently asked questions

What is CVE-2021-0387?: In FindQuotaDeviceForUuid of QuotaUtils.cpp, there is a possible use-after-free due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-169421939
How severe is CVE-2021-0387?: CVE-2021-0387 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-0387 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-2021-0387?: CVE-2021-0387 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-0387?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-0387 published?: CVE-2021-0387 was published on 2021-03-10 and last updated on 2026-06-17.

References

https://source.android.com/security/bulletin/pixel/2021-03-01

Affected products (1)

cpe:2.3:o:google:android:11.0:*:*:*:*:*:*:*

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