Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-43629— llama.cpp b4882–b9058 Buffer Overflow in KV Cache State Restore

Quick assessment

Affected
ggml-org llama.cpp
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ggml llama.cpp是ggml组织的一个在本地执行大语言模型推理的引擎。 ggml llama.cpp b4882版本至b9058版本存在安全漏洞，该漏洞源于KV缓存状态恢复路径中state_read_data()函数计算写入大小时未进行溢出检查，可能导致具有slot_save_path目录写权限的攻击者破坏堆内存，通过构造恶意状态文件写入越界数据，造成堆元数据损坏、模型权重损坏或任意代码执行。

CVSS 8.1 · High EPSS 0.70% · P51

Affected Version Matrix 2

VendorProduct Version RangeStatus
ggml-org llama.cpp b4882≤ b9058 affected
0.16.1≤ 0.17.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-43629

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
llama.cpp b4882–b9058 Buffer Overflow in KV Cache State Restore
Source: CVE Program / CVE List V5
Vulnerability Description
llama.cpp builds b4882 through b9058 contain a heap buffer overflow vulnerability in the KV cache state restore path where the state_read_data() function computes write size without overflow checking, allowing attackers with write access to the slot_save_path directory to corrupt heap memory. Attackers can craft malicious state files where cell_count multiplication overflows or exceeds tensor buffer allocation to write attacker-controlled bytes past buffer boundaries, potentially resulting in heap metadata corruption, model weight corruption, or arbitrary code execution via function pointer overwrite.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
ggml llama.cpp 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ggml llama.cpp是ggml组织的一个在本地执行大语言模型推理的引擎。 ggml llama.cpp b4882版本至b9058版本存在安全漏洞，该漏洞源于KV缓存状态恢复路径中state_read_data()函数计算写入大小时未进行溢出检查，可能导致具有slot_save_path目录写权限的攻击者破坏堆内存，通过构造恶意状态文件写入越界数据，造成堆元数据损坏、模型权重损坏或任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ggml-org llama.cpp b4882 ~ b9058 -

II. Public POCs for CVE-2026-43629

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9736 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-43629

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-43629 (1)

Vendor Advisories for CVE-2026-43629 (1)

Same Patch Batch · ggml-org · 2026-08-06 · 10 CVEs total

CVE-2026-43632 8.1 HIGH llama.cpp b7492–b9060 Use-After-Free in Tokenization Endpoints
CVE-2026-43631 8.1 HIGH llama.cpp b7492–b9060 Use-After-Free RCE via llama-server
CVE-2026-43622 7.8 HIGH llama.cpp b1886–b7445 Double Free via llama-android.cpp
CVE-2026-43627 7.8 HIGH llama.cpp b1283–b9058 Integer Overflow in llama_batch_init() Function
CVE-2026-43628 7.8 HIGH llama.cpp b3978–b9058 Integer Underflow via DRY Sampler
CVE-2026-70638 7.8 HIGH llama.cpp b1886–b7445 Integer Overflow via new_1batch() in llama-android.cpp
CVE-2026-70640 7.0 HIGH llama.cpp b1886–b7445 Race Condition Use-After-Free via llama-android.cpp
CVE-2026-43630 6.5 MEDIUM llama.cpp b5702–b7653 Out-of-Bounds Read Information Disclosure
CVE-2026-70639 5.5 MEDIUM llama.cpp b1886–b7445 Null Pointer Dereference DoS via llama-android.cpp

IV. Related Vulnerabilities

Same product: llama.cpp
Same vendor: ggml-org
Same weakness: CWE-787

V. Comments for CVE-2026-43629

No comments yet

Leave a comment