Stream: git-wasmtime

Topic: wasmtime / PR #12018 [36.0.x] Prevent using shared memori...

Wasmtime GitHub notifications bot (Nov 11 2025 at 15:35):

alexcrichton opened PR #12018 from alexcrichton:release-36.0.0 to bytecodealliance:release-36.0.0:

This commit fixes a few issues where it was possible to represent a wasm shared linear memory with the wasmtime::Memory type. This is not sound because wasmtime::Memory provides safe Rust access to the bytes where that is not possible with wasm shared memories. Shared memories in Rust must be represented by SharedMemory, not wasmtime::Memory.

Specifically this commit prevents two vectors of this happening:

1. Memory::new now requires that the memory type specified is non-shared. Instead SharedMemory::new must be used instead.

2. Core dumps now skip over shared memories when iterating over all memories in the store. Supporting shared memories is a more invasive change and will happen on Wasmtime's main branch.

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Wasmtime GitHub notifications bot (Nov 11 2025 at 15:35):

alexcrichton requested dicej for a review on PR #12018.

Wasmtime GitHub notifications bot (Nov 11 2025 at 15:35):

alexcrichton requested wasmtime-core-reviewers for a review on PR #12018.

Wasmtime GitHub notifications bot (Nov 11 2025 at 15:36):

alexcrichton requested wasmtime-default-reviewers for a review on PR #12018.

Wasmtime GitHub notifications bot (Nov 11 2025 at 15:53):

alexcrichton updated PR #12018.

Wasmtime GitHub notifications bot (Nov 11 2025 at 17:58):

alexcrichton commented on PR #12018:

Carrying over @pchickey's approval from the security advisory.

Wasmtime GitHub notifications bot (Nov 11 2025 at 17:58):

alexcrichton merged PR #12018.

Last updated: Dec 06 2025 at 06:05 UTC