CVE-2026-34946— wasmtime 安全漏洞
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一、 漏洞 CVE-2026-34946 基础信息
漏洞信息
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Vulnerability Title
Wasmtime's host panics when Winch compiler executes `table.fill`
来源: CVE Program / CVE List V5
Vulnerability Description
Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's Winch compiler contains a vulnerability where the compilation of the table.fill instruction can result in a host panic. This means that a valid guest can be compiled with Winch, on any architecture, and cause the host to panic. This represents a denial-of-service vulnerability in Wasmtime due to guests being able to trigger a panic. The specific issue is that a historical refactoring changed how compiled code referenced tables within the table.* instructions. This refactoring forgot to update the Winch code paths associated as well, meaning that Winch was using the wrong indexing scheme. Due to the feature support of Winch the only problem that can result is tables being mixed up or nonexistent tables being used, meaning that the guest is limited to panicking the host (using a nonexistent table), or executing spec-incorrect behavior and modifying the wrong table. This vulnerability is fixed in 36.0.7, 42.0.2, and 43.0.1.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
控制流实现总是不正确
来源: CVE Program / CVE List V5
Vulnerability Title
wasmtime 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
wasmtime是Bytecode Alliance开源的一个轻量级WebAssembly运行时。 Wasmtime 25.0.0至36.0.7之前版本、42.0.2之前版本和43.0.1之前版本存在安全漏洞，该漏洞源于编译table.fill指令可能导致主机恐慌，构成拒绝服务漏洞，具体问题源于历史重构更改了编译代码在table.*指令中引用表的方式，但未更新相关的Winch代码路径，导致Winch使用了错误的索引方案。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| bytecodealliance | wasmtime | >= 25.0.0, < 36.0.7 | - |
二、漏洞 CVE-2026-34946 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · bytecodealliance · 2026-04-09 · 共 12 条
| CVE-2026-35195 | wasmtime 缓冲区错误漏洞 | |
| CVE-2026-35186 | wasmtime 安全漏洞 | |
| CVE-2026-34983 | wasmtime 资源管理错误漏洞 | |
| CVE-2026-34941 | wasmtime 缓冲区错误漏洞 | |
| CVE-2026-34942 | wasmtime 输入验证错误漏洞 | |
| CVE-2026-34988 | wasmtime 缓冲区错误漏洞 | |
| CVE-2026-34971 | wasmtime 缓冲区错误漏洞 | |
| CVE-2026-34944 | wasmtime 安全漏洞 | |
| CVE-2026-34945 | wasmtime 安全漏洞 | |
| CVE-2026-34987 | wasmtime 缓冲区错误漏洞 | |
| CVE-2026-34943 | wasmtime 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-34946
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