How severe is CVE-2021-1048?

CVE-2021-1048 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-1048 being actively exploited?

Yes. CVE-2021-1048 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-05-23, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2021-1048?

CVE-2021-1048 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-1048?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2021-1048 have an EU (EUVD) identifier?

Yes. CVE-2021-1048 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-6515. It is also flagged as exploited in the EUVD (since 2022-05-23).

When was CVE-2021-1048 published?

CVE-2021-1048 was published on 2021-12-15 and last updated on 2026-06-17.

CVE-2021-1048

CVE-2021-1048 is a high-severity vulnerability in Google Android with a CVSS 3.x base score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-05-23). The underlying weakness is classified as CWE-416.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-05-23)
EU (EUVD) id: EUVD-2021-6515
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-05-23)
Weakness: CWE-416
Affected product: Google Android
Published: 2021-12-15
Last modified: 2026-06-17

Description

In ep_loop_check_proc of eventpoll.c, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-204573007References: Upstream kernel

Frequently asked questions

What is CVE-2021-1048?: In ep_loop_check_proc of eventpoll.c, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-204573007References: Upstream kernel
How severe is CVE-2021-1048?: CVE-2021-1048 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-1048 being actively exploited?: Yes. CVE-2021-1048 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-05-23, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2021-1048?: CVE-2021-1048 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-1048?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2021-1048 have an EU (EUVD) identifier?: Yes. CVE-2021-1048 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-6515. It is also flagged as exploited in the EUVD (since 2022-05-23).
When was CVE-2021-1048 published?: CVE-2021-1048 was published on 2021-12-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:google:android:-:*:*:*:*:*:*:*

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