rust-wasmtime: Wasmtime is a runtime for WebAssembly
CVE-2026-44216 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-44216, released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.
Wasmtime is a runtime for WebAssembly. From 30.0.0 to 36.0.8, 43.0.2, and 44.0.1, Wasmtime's allocation logic for a WebAssembly table contained checked arithmetic which panicked on overflow. This overflow is possible to trigger, and thus panic, when a table with an extremely large size is allocated. This is possible with the WebAssembly memory64 proposal where tables can have sizes in the 64-bit range as opposed to the previous 32-bit range which would not overflow. The panic happens when attempting to create a very large table, such as when instantiating a WebAssembly module or component. This vulnerability is fixed in 36.0.8, 43.0.2, and 44.0.1.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| rust-wasmtime · Debian 14 | 36.0.8+dfsg-1 | DEBIAN-CVE-2026-44216 | May 15, 2026 |
| tree-sitter · sles 16.0 | 0.26.8-160000.2.1 | SUSE-SU-2026:22002-1 | Jun 1, 2026 |
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