CVE-2020-0041
Published: November 3, 2021
Official Description
Android Kernel binder_transaction of binder.c contains an out-of-bounds write vulnerability due to an incorrect bounds check that could allow for local privilege escalation. This vulnerability was observed chained with CVE-2019-2215 and CVE-2020-0069 under exploit chain "AbstractEmu."
CISA KEV Advisory
Android Kernel Out-of-Bounds Write Vulnerability
Android Kernel binder_transaction of binder.c contains an out-of-bounds write vulnerability due to an incorrect bounds check that could allow for local privilege escalation. This vulnerability was observed chained with CVE-2019-2215 and CVE-2020-0069 under exploit chain "AbstractEmu."
Apply updates per vendor instructions.
Risk Analysis
An out-of-bounds write vulnerability in the Android Kernel's binder_transaction function could allow for local privilege escalation. The high EPSS score and confirmed exploitation by CISA, including its use in an exploit chain, make this a critical vulnerability. This flaw is rated as HIGH severity.
This vulnerability is actively being exploited in the wild and has been observed as part of an exploit chain. It requires local access for privilege escalation.
Android users should apply available security updates for the kernel to address this out-of-bounds write vulnerability. Ensure devices are regularly patched to prevent local privilege escalation.
Technical Analysis
CVE-2020-0041 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2020-0041 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-0041 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1