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CVE-2026-7141— vLLM KV Block kv_cache_interface.py has_mamba_layers uninitialized resource

Quick assessment

Affected
n/a vLLM
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

vLLM是vLLM开源的一个适用于 LLM 的高吞吐量和内存高效推理和服务引擎。 vllm 0.19.0及之前版本存在安全漏洞，该漏洞源于KV Block Handler组件中文件vllm/v1/kv_cache_interface.py的函数has_mamba_layers的操作，可能导致未初始化资源。

CVSS 5.6 · Medium EPSS 0.48% · P39

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 19

VendorProduct Version RangeStatus
n/a vLLM 0.1 affected
0.2 affected
0.3 affected
0.4 affected
0.5 affected
0.6 affected
0.7 affected
0.8 affected
… +11 more rows
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I. Basic Information for CVE-2026-7141

Vulnerability Information
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Vulnerability Title
vLLM KV Block kv_cache_interface.py has_mamba_layers uninitialized resource
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in vLLM up to 0.19.0. The affected element is the function has_mamba_layers of the file vllm/v1/kv_cache_interface.py of the component KV Block Handler. Performing a manipulation results in uninitialized resource. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitability is described as difficult. The exploit has been made public and could be used. The existence of this vulnerability is still disputed at present. The proposed patch did not fix the issue. A 3rd party explains: "The divergence could be explained by a benign and expected vLLM behavior where vLLM server could group concurrent requests together resulting in different input shapes based on varying request arrival time. The differences in grouped input shapes could call different kernels with could produce difference results due to rounding and differences in order of operations. There is an environment variable VLLM_BATCH_INVARIANT=1 for users that desire to have deterministic output with temperature 0.0."
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对未经初始化资源的使用
Source: CVE Program / CVE List V5
Vulnerability Title
vLLM 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
vLLM是vLLM开源的一个适用于 LLM 的高吞吐量和内存高效推理和服务引擎。 vllm 0.19.0及之前版本存在安全漏洞，该漏洞源于KV Block Handler组件中文件vllm/v1/kv_cache_interface.py的函数has_mamba_layers的操作，可能导致未初始化资源。
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
- vLLM 0.1 cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-7141

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III. Intelligence Information for CVE-2026-7141

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Patches & Fixes for CVE-2026-7141 (2)

News Coverage for CVE-2026-7141 (1)

Other References for CVE-2026-7141 (2)

Same Patch Batch · n/a · 2026-04-27 · 21 CVEs total

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CVE-2025-69689 Fan Control 安全漏洞
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CVE-2026-38935 Diskover Community Edition 跨站脚本漏洞
CVE-2026-38934 Diskover Community Edition 跨站请求伪造漏洞
CVE-2026-38936 Diskover Community Edition 跨站脚本漏洞
CVE-2026-30346 /dev/push 输入验证错误漏洞
CVE-2026-30352 AutoForge 命令注入漏洞
CVE-2026-30351 AutoForge 路径遍历漏洞

IV. Related Vulnerabilities

Same product: vLLM
Same vendor: n/a
Same weakness: CWE-908

V. Comments for CVE-2026-7141

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