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EUVD-2026-28007

2026-10-03T11:27:52.912415+00:00

EUVD-2026-28007

fkie_cve-2021-32629

2026-10-03T11:27:52.912446+00:00

Cranelift is an open-source code generator maintained by Bytecode Alliance. It translates a target-independent intermediate representation into executable machine code. There is a bug in 0.73 of the Cranelift x64 backend that can create a scenario that could result in a potential sandbox escape in a Wasm program. This bug was introduced in the new backend on 2020-09-08 and first included in a release on 2020-09-30, but the new backend was not the default prior to 0.73. The recently-released version 0.73 with default settings, and prior versions with an explicit build flag to select the new backend, are vulnerable. The bug in question performs a sign-extend instead of a zero-extend on a value loaded from the stack, under a specific set of circumstances. If those circumstances occur, the bug could allow access to memory addresses upto 2GiB before the start of the Wasm program heap. If the heap bound is larger than 2GiB, then it would be possible to read memory from a computable range dependent on the size of the heaps bound. The impact of this bug is highly dependent on heap implementation, specifically: * if the heap has bounds checks, and * does not rely exclusively on guard pages, and * the heap bound is 2GiB or smaller * then this bug cannot be used to reach memory from another Wasm program heap. The impact of the vulnerability is mitigated if there is no memory mapped in the range accessible using this bug, for example, if there is a 2 GiB guard region before the Wasm pro…

GHSA-hpqh-2wqx-7qp5 — Memory access due to code generation flaw in Cranelift module

2026-10-03T11:27:52.912498+00:00

Affected: crates.io: cranelift-codegen, PyPI: wasmtime

There is a bug in 0.73.0 of the Cranelift x64 backend that can create a scenario that could result in a potential sandbox escape in a WebAssembly module. Users of versions 0.73.0 of Cranelift should upgrade to either 0.73.1 or 0.74 to remediate this vulnerability. Users of Cranelift prior to 0.73.0 should update to 0.73.1 or 0.74 if they were not using the old default backend.

### Description

This bug was introduced in the new backend on 2020-09-08 and first included in a release on 2020-09-30, but the new backend was not the default prior to 0.73.0. The recently-released version 0.73.0 with default settings, and prior versions with an explicit build flag to select the new backend, are vulnerable. The bug in question performs a sign-extend instead of a zero-extend on a value loaded from the stack, under a specific set of circumstances. If those circumstances occur, the bug could allow access to memory addresses up to 2GiB before the start of the heap allocated for the WebAssembly module.

If the heap bound is larger than 2GiB, then it would be possible to read memory from a computable range dependent on the size of the heap's bound.

The impact of this bug is highly dependent on heap implementation; specifically: * if the heap has bounds checks, and * does not rely exclusively on guard pages, and * the heap bound is 2GiB or smaller

then this bug cannot be used to reach memory from another WebAssembly module heap.

The impact of the vulnerability is mitigated if th…

gsd-2021-32629

2026-10-03T11:27:52.912570+00:00

gsd-2021-32629

openSUSE-SU-2024:10673-1 — cargo-audit-advisory-db-20210802-1.2 on GA media

2026-10-03T11:27:52.912584+00:00

cargo-audit-advisory-db-20210802-1.2 on GA media

PYSEC-2021-87

2026-10-03T11:27:52.912603+00:00

Affected: PyPI: wasmtime

RUSTSEC-2021-0067 — Memory access due to code generation flaw in Cranelift module

2026-10-03T11:27:52.912641+00:00

Affected: crates.io: cranelift-codegen

More details can be found in the GitHub Security Advisory at: