Wasmtime GitHub notifications bot (Oct 14 2026 at 15:24): Wasmtime GitHub notifications bot (Oct 14 2026 at 15:24):alexcrichton opened PR #14733 from alexcrichton:stream-type-mismatch to bytecodealliance:main:
Previously,
UntypedWriteBuffer::get_mutpanicked on type mismatch, which created a hazard for embedders which might receive their own stream back from the guest using a different Rust-level item type despite having the same component-model-level item type. Now we return an error instead.Part of https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-63h4-6cx9-pjfj
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Wasmtime GitHub notifications bot (Oct 14 2026 at 15:24):alexcrichton requested cfallin for a review on PR #14733.
Wasmtime GitHub notifications bot (Oct 14 2026 at 15:24):alexcrichton requested wasmtime-core-reviewers for a review on PR #14733.
Wasmtime GitHub notifications bot (Oct 14 2026 at 16:04):alexcrichton updated PR #14733.
Wasmtime GitHub notifications bot (Oct 14 2026 at 19:39)::thumbs_up: cfallin submitted PR review.
Wasmtime GitHub notifications bot (Oct 14 2026 at 19:40):cfallin commented on PR #14733:
(merge conflict at the moment)
Wasmtime GitHub notifications bot (Oct 14 2026 at 19:49):alexcrichton updated PR #14733.
Wasmtime GitHub notifications bot (Oct 14 2026 at 19:49):alexcrichton has enabled auto merge for PR #14733.
Wasmtime GitHub notifications bot (Oct 14 2026 at 19:59):alexcrichton updated PR #14733.
Wasmtime GitHub notifications bot (Oct 14 2026 at 20:09):alexcrichton added PR #14733 return error instead of panicking on host stream type mismatch to the merge queue.
Wasmtime GitHub notifications bot (Oct 14 2026 at 20:31):github-merge-queue[bot] removed PR #14733 return error instead of panicking on host stream type mismatch from the merge queue.
Wasmtime GitHub notifications bot (Oct 14 2026 at 20:35):alexcrichton updated PR #14733.
Wasmtime GitHub notifications bot (Oct 14 2026 at 20:35):alexcrichton has enabled auto merge for PR #14733.
Wasmtime GitHub notifications bot (Oct 14 2026 at 20:46):alexcrichton added PR #14733 return error instead of panicking on host stream type mismatch to the merge queue.
Wasmtime GitHub notifications bot (Oct 14 2026 at 21:09)::check: alexcrichton merged PR #14733.
Wasmtime GitHub notifications bot (Oct 14 2026 at 21:09):alexcrichton removed PR #14733 return error instead of panicking on host stream type mismatch from the merge queue.
Last updated: Oct 31 2026 at 23:03 UTC