CVE-2025-27363 — AI Deep Analysis Summary

🚨 **Essence**: A critical buffer overflow in **FreeType** (font rendering library). 📄 **Cause**: Out-of-bounds write when parsing **TrueType GX** & **Variable Fonts**.…

🛡️ **Flaw**: **Buffer Overflow** (Heap Buffer Overflow). 🔍 **Technical Detail**: Improper bounds checking during glyph loading (`load_truetype_glyph`).…

🎯 **Vendor**: FreeType. 📦 **Product**: FreeType Library. 📅 **Affected Versions**: **2.13.0** and earlier. 🌐 **Impact**: Affects apps/libraries using FreeType, including **Chrome** browser.

💻 **Privileges**: **Arbitrary Code Execution**. 📊 **Data**: Full **Confidentiality**, **Integrity**, & **Availability** loss (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).…

⚡ **Threshold**: **High** (AC:H). 🚫 **Auth**: None required (PR:N). 👁️ **UI**: None required (UI:N). 🌍 **Attack Vector**: Network (AV:N). *Note: Requires triggering the specific font parsing path.*

🔓 **Public Exp?**: **Yes**. 📜 **PoC**: Available on GitHub (e.g., `zhuowei/CVE-2025-27363-proof-of-concept`). 🧪 **Method**: Modifies **Roboto Flex** font to trigger crash/overflow via composite glyphs.…

🔍 **Check**: Scan for **FreeType < 2.13.1**. 📄 **Indicator**: Presence of malicious **TrueType GX** or **Variable Fonts**.…

✅ **Fixed?**: **Yes**. 📅 **Date**: Patched after March 11, 2025. 🔗 **Commit**: `ef636696524b081f1b8819eb0c6a0b932d35757d` on FreeType GitHub.…

🛑 **Workaround**: **Disable** or restrict **TrueType GX/Variable Font** parsing if possible. 🚫 **Block**: Filter malicious fonts at the network/application layer.…

🔥 **Urgency**: **CRITICAL**. 🚨 **Priority**: **P1**. 📉 **CVSS**: **7.5** (High). ⚠️ **Reason**: Remote code execution potential, no auth/UI required, public PoC exists.…