The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime with its     Winch (baseline) non-default compiler backend may allow properly constructed guest Wasm to access host     memory outside of its linear-memory sandbox. This vulnerability requires use of the Winch compiler     (-Ccompiler=winch). By default, Wasmtime uses its Cranelift backend, not Winch. With Winch, the same     incorrect assumption is present in theory on both aarch64 and x86-64. The aarch64 case has an observed-     working proof of concept, while the x86-64 case is theoretical and may not be reachable in practice. This     Winch compiler bug can allow the Wasm guest to access memory before or after the linear-memory region,     independently of whether pre- or post-guard regions are configured. The accessible range in the initial     bug proof-of-concept is up to 32KiB before the start of memory, or ~4GiB after the start of memory,     independently of the size of pre- or post-guard regions or the use of explicit or guard-region-based     bounds checking. However, the underlying bug assumes a 32-bit memory offset stored in a 64-bit register     has its upper bits cleared when it may not, and so closely related variants of the initial proof-of-     concept may be able to access truly arbitrary memory in-process. This could result in a host process     segmentation fault (DoS), an arbitrary data leak from the host process, or with a write, potentially an     arbitrary RCE. This vulnerability is fixed in 36.0.7, 42.0.2, and 43.0.1. (CVE-2026-34987)

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Linux Distros Unpatched Vulnerability : CVE-2026-34987

critical Nessus Plugin ID 305809

Version 1.3