Full Report
Google has released its monthly security updates for Android with fixes for 46 security flaws, including one vulnerability that it said has been exploited in the wild. The vulnerability in question is CVE-2025-27363 (CVSS score: 8.1), a high-severity flaw in the System component that could lead to local code execution without requiring any additional execution privileges. "The most severe of
Analysis Summary
# Vulnerability: Actively Exploited Android System LCE Flaw via Font Parsing
## CVE Details
- CVE ID: CVE-2025-27363
- CVSS Score: 8.1 (High)
- CWE: Out-of-bounds Write (Inferred from description related to font parsing)
## Affected Systems
- Products: Android Operating System
- Versions: Not explicitly listed, but affects devices receiving the May 2025 Security Update.
- Configurations: Specific to the handling of font rendering, particularly when processing TrueType GX and variable font files.
## Vulnerability Description
This vulnerability is an Out-of-Bounds Write flaw rooted in the FreeType open-source font rendering library used within the Android System component. Successful exploitation allows an attacker to achieve Local Code Execution (LCE) simply by causing the system to parse a specially crafted TrueType GX or variable font file. No user interaction or additional execution privileges are required.
## Exploitation
- Status: Exploited in the wild (limited, targeted exploitation noted)
- Complexity: Low (Exploitation does not require user interaction)
- Attack Vector: Adjacent (Likely local access required to trigger font rendering, or interaction with a malicious file)
## Impact
- Confidentiality: High (Potential for code execution leads to high risk)
- Integrity: High (Potential for code execution leads to high risk)
- Availability: High (Potential for code execution leads to high risk)
## Remediation
### Patches
- Google's May 2025 Android Security Update specifically addresses this flaw.
- The underlying FreeType library vulnerability was fixed in versions higher than 2.13.0. Users should install the latest available Android security patch.
### Workarounds
- No specific vendor workarounds were detailed, but general mitigation strategies apply:
1. Ensure devices are updated immediately.
2. Limit installation of applications from untrusted sources that might attempt to manipulate local files or font rendering contexts.
## Detection
- Indicators of Compromise (IoCs): Not explicitly detailed in the provided text, but look for anomalous activity originating from the system component following file parsing events.
- Detection Methods and Tools: Monitoring system-level process activity related to font rendering services after file input.
## References
- Vendor Advisory: Google May 2025 Android Security Bulletin ([source.android.com/docs/security/bulletin/2025-05-01](https://source.android.com/docs/security/bulletin/2025-05-01) - Defanged)
- Original Disclosure Context: FreeType vulnerability disclosure from March 2025 (mentioned in context).