提交 #799118: ggml-org llama.cpp confirmed commit e15efe0 CWE-617 (Reachable Assertion)

## Summary

The jinja parser constructs a `filter_expression` without validating the pipe `|` operand type. When the operand is a literal (e.g., integer `9`), the `chk_type` assertion fires → `abort()`. 7-byte payload (`{{9|9|{`). Reachable if server processes user-specified `chat_template` parameters.

---

## Exploit / PoC

**File:** `poc-020-jinja-assert-abort.bin` (7 bytes: `{{9|9|{`)

**Reproduction:**
```
Input: {{9|9|{
→ chk_type assertion failed in runtime.h:126
→ abort()
```

---

## Suggested Fix

Validate filter operand type in `parse_filter_expression()`.

---

## Discovery

- **Tool:** Crucible fuzzer (jinja campaign)
- **Date:** 2026-04-03
- **Confirmed on:** llama.cpp commit e15efe0, Fedora 43 x86_64

• 来源: ⚠️ https://drive.proton.me/urls/R8D8NGZ6Z0#C2cVZYn5z1Xc
• 用户: m00dy (UID 97162)
• 提交: 2026-04-07 21時23分 (4 月前)
• 管理: 2026-08-02 20時58分 (4 months later)
• 状态: 已接受
• VulDB条目: 385409 [ggml-org llama.cpp e15efe0 Jinja Minja Template Parser common/jinja/parser.cpp 拒绝服务]
• 积分: 20