Android · Kernel
CVE-2021-1048
Android Kernel Use-After-Free Vulnerability
What it is
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
CISA: Android kernel contains a use-after-free vulnerability that allows for privilege escalation.
What to do
Apply updates per vendor instructions.
Deadline for US federal agencies: June 13, 2022
- Added to the CISA list
- May 23, 2022
- Published
- December 15, 2021
- Severity
- High 7.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 1.1% in the top 35.7% of all known vulnerabilities
- Weakness
- CWE-416
- More details
- NVD · CVE.org · CISA
All references (1)
More exploited flaws from Android
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Aug 7, 2024 | Remote Code Execution | Kernel | High 7.8 | 2.7% |
| May 23, 2022 | Race Condition | Kernel | Medium 6.4 | 0.9% |
| Jun 2, 2026 | Integer Overflow | Framework | High 8.4 | 1.9% |
| Dec 2, 2025 | Privilege Escalation | Framework | High 7.8 | 0.3% |
| Dec 2, 2025 | Information Disclosure | Framework | Medium 5.5 | 0.3% |
| Sep 4, 2025 | Use-After-Free | Runtime | High 8.8 | 0.6% |
| Nov 7, 2024 | Privilege Escalation | Framework | High 7.3 | 0.7% |
| Jun 13, 2024 | Privilege Escalation | Pixel | High 8.1 | 3.0% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.