Exploited CVEs / Android / CVE-2021-1048
CVE-2021-1048
Android Kernel Use-After-Free Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2022-06-13 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.
Risk summary
Actively exploited Android Kernel vulnerability, High severity, CVSS 7.8. Added to the CISA KEV catalog 2022-05-23.
Senserva AI Opinion for CVE-2021-1048
The Android kernel carries a use-after-free enabling privilege escalation, CVSS 7.8, exploited in the wild per CISA (KEV, 2022-05-23) with a 1% EPSS score characteristic of targeted mobile attacks. Kernel escalation is the step that turns a malicious app or browser exploit into full device control on Android. Fragmented vendor patching means many handsets received the fix months late or never.
Do this: Report on Android security patch levels across your fleet and block devices below the fix date from corporate mail and VPN.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2021-1048
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Updated August 14, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Full tracking and change history for CVE-2021-1048
- Published
- 2022-05-23
- Last revised
- 2022-05-23
- Changes tracked
- 1
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
- 2022-05-23 added to the CISA KEV catalog by CISA
- 2026-07-17 CVSS 0.0 to 7.8; EPSS first scored at 1.1%
- 2026-07-24 EPSS 1.1% to 0.8%
Recorded by Senserva on the dates shown, from CISA KEV and FIRST EPSS. This is what moved and when, which neither the vendor advisory nor NVD publishes.
CISA required action
Federal (BOD 22-01) remediation due date: 2022-06-13 (past due).
Apply updates per vendor instructions.
Official fix for CVE-2021-1048
Check the vendor's security advisory channel for the patched Kernel versions and workarounds.
Common questions about CVE-2021-1048
Is CVE-2021-1048 actively exploited?
Yes. CVE-2021-1048 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2022-05-23, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is <1%.
What is the CISA deadline and required action for CVE-2021-1048?
CISA set the federal (BOD 22-01) remediation due date at 2022-06-13, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.
What fixes CVE-2021-1048?
Check the vendor's security advisory for the patched Kernel versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2021-1048?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2021-1048's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
Scope and sources
- More exploited Android CVEs
- CVE-2025-48595CVE-2025-48633CVE-2025-48572CVE-2025-48543CVE-2024-43093CVE-2024-36971CVE-2024-32896CVE-2024-29748
All Android exploited CVEs on one page: Android vulnerabilities actively exploited.
- Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.