// 简化的伪代码，说明易受攻击的路径
void bta_hf_client_cb_init(tBTA_HF_CLIENT_CB *client_cb) {
    free(client_cb->p_disc_db);        // SDP 发现数据库在错误时被释放
    // ... 其他处理 ...
    use(client_cb->p_disc_db);         // ⚠️ 释放后使用！CVE-2025-48593
    execute_callback(client_cb);        // 攻击者控制的代码路径
}

# 1. 检查你的补丁级别
adb shell getprop ro.build.version.security_patch
# → 应显示：2025-11-01 或更晚

sequenceDiagram
    participant Attacker as Attacker
    participant BT as Bluetooth Channel
    participant Device as Android Device (Headset Mode)
    participant System as Bluetooth HFP Handler

    Attacker->>Device: Request Bluetooth Pairing
    Device-->>Attacker: Victim accepts pairing
    Attacker->>BT: Send Malformed HFP SDP Packet
    BT->>Device: Deliver Packet (Zero further interaction)
    Device->>System: bta_hf_client_sdp_cback(error)
    Note over System: p_disc_db freed, dangling pointer remains
    Note over System: ⚠️ Use-After-Free triggered
    System-->>Device: Corrupted memory / dangling pointer
    Device->>System: Execute attacker-controlled code
    System->>Attacker: Remote Shell / Data Exfiltration
    Note over Device,System: Full RCE Achieved

graph TD
    A[Google Releases Patch\nNov 1/5, 2025] --> B{OEM Integration}
    B --> C[Samsung, OnePlus, etc.]
    B --> D[Google Pixel]
    B --> E[LineageOS ✅ Patched]
    B --> F[GrapheneOS ✅ Patched\n+ hardened_malloc mitigation]
    C --> G[Monthly Security Update]
    D --> H[Pixel OTA Push]
    G & H & E & F --> I[User Installs Update]
    I --> J[Patch Level: 2025-11-01+]
    J --> K[✅ CVE-2025-48593 Mitigated]
    style A fill:#1976d2,color:#fff
    style K fill:#1b5e20,color:#fff
    style I fill:#ff9800,color:#fff

graph LR
    subgraph "预防"
        P1[应用2025年11月补丁]
        P2[关闭未使用的蓝牙]
        P3[Google Play 保护]
        P4[拒绝未知蓝牙配对]
        P5[使用 GrapheneOS / 加固版系统]
    end
    subgraph "检测"
        D1[监控异常蓝牙流量]
        D2[关注蓝牙服务崩溃]
        D3[端点取证]
    end
    subgraph "响应"
        R1[隔离设备]
        R2[强制 OTA 更新]
        R3[向 Google/OEM 报告]
    end
    P1 & P2 & P3 & P4 & P5 --> D1 & D2 & D3 --> R1 & R2 & R3
    style P1 fill:#1b5e20,color:#fff
    style R1 fill:#b71c1c,color:#fff