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 32.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's     Cranelift compilation backend contains a bug on aarch64 when performing a certain shape of heap accesses     which means that the wrong address is accessed. When combined with explicit bounds checks a guest     WebAssembly module this can create a situation where there are two diverging computations for the same     address: one for the address to bounds-check and one for the address to load. This difference in address     being operated on means that a guest module can pass a bounds check but then load a different address.
    Combined together this enables an arbitrary read/write primitive for guest WebAssembly when accesssing     host memory. This is a sandbox escape as guests are able to read/write arbitrary host memory. This     vulnerability has a few ingredients, all of which must be met, for this situation to occur and bypass the     sandbox restrictions. This miscompiled shape of load only occurs on 64-bit WebAssembly linear memories, or     when Config::wasm_memory64 is enabled. 32-bit WebAssembly is not affected. Spectre mitigations or signals-     based-traps must be disabled. When spectre mitigations are enabled then the offending shape of load is not     generated. When signals-based-traps are disabled then spectre mitigations are also automatically disabled.
    The specific bug in Cranelift is a miscompile of a load of the shape load(iadd(base, ishl(index, amt)))     where amt is a constant. The amt value is masked incorrectly to test if it's a certain value, and this     incorrect mask means that Cranelift can pattern-match this lowering rule during instruction selection     erroneously, diverging from WebAssembly's and Cranelift's semantics. This incorrect lowering would, for     example, load an address much further away than intended as the correct address's computation would have     wrapped around to a smaller value insetad. This vulnerability is fixed in 36.0.7, 42.0.2, and 43.0.1.
    (CVE-2026-34971)

Note that Nessus relies on the presence of the package as reported by the vendor.

Detections

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Linux Distros Unpatched Vulnerability : CVE-2026-34971

critical Nessus Plugin ID 305812

Version 1.5

Version 1.4

Version 1.3

Version 1.2

Version 1.1

Version 1.5 Apr 29, 2026, 12:50 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202604291250
Version 1.4 Apr 26, 2026, 11:18 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202604261118
Version 1.3 Apr 13, 2026, 9:27 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202604132127
Version 1.2 Apr 10, 2026, 7:42 PM CVSS metrics ("CVSSv2 score" set to 4.4) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:P") CVSS metrics ("CVSSv3 score" set to 7.8) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H") CVSSv2 severity (based on CVE-2026-34971, severity decreased from "High" to "Medium") Detection (updated detection logic) Plugin metadata Plugin Feed: 202604101942
Version 1.1 Apr 10, 2026, 8:54 AM New Plugin Feed: 202604100854