CVSS: 6.8EPSS: 0%CPEs: 2EXPL: 0CVE-2022-31104 – Miscompilation of `i8x16.swizzle` and `select` with v128 inputs in Wasmtime
https://notcve.org/view.php?id=CVE-2022-31104
Wasmtime is a standalone runtime for WebAssembly. In affected versions wasmtime's implementation of the SIMD proposal for WebAssembly on x86_64 contained two distinct bugs in the instruction lowerings implemented in Cranelift. The aarch64 implementation of the simd proposal is not affected. The bugs were presented in the `i8x16.swizzle` and `select` WebAssembly instructions. The `select` instruction is only affected when the inputs are of `v128` type. • https://docs.rs/wasmtime/latest/wasmtime/struct.Config.html#method.wasm_simd https://github.com/bytecodealliance/wasmtime/pull/4317 https://github.com/bytecodealliance/wasmtime/pull/4318 https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-jqwc-c49r-4w2x https://github.com/webassembly/simd https://webassembly.github.io/spec • CWE-682: Incorrect Calculation •
CVSS: 9.8EPSS: 0%CPEs: 2EXPL: 0CVE-2022-24791 – Use after free in Wasmtime
https://notcve.org/view.php?id=CVE-2022-24791
Wasmtime is a standalone JIT-style runtime for WebAssembly, using Cranelift. There is a use after free vulnerability in Wasmtime when both running Wasm that uses externrefs and enabling epoch interruption in Wasmtime. If you are not explicitly enabling epoch interruption (it is disabled by default) then you are not affected. If you are explicitly disabling the Wasm reference types proposal (it is enabled by default) then you are also not affected. The use after free is caused by Cranelift failing to emit stack maps when there are safepoints inside cold blocks. • https://github.com/bytecodealliance/wasmtime/commit/666c2554ea0e1728c35aa41178cf235920db888a https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-gwc9-348x-qwv2 • CWE-416: Use After Free •
CVSS: 8.1EPSS: 0%CPEs: 2EXPL: 0CVE-2022-23636 – Invalid drop of partially-initialized instances in wasmtime
https://notcve.org/view.php?id=CVE-2022-23636
Wasmtime is an open source runtime for WebAssembly & WASI. Prior to versions 0.34.1 and 0.33.1, there exists a bug in the pooling instance allocator in Wasmtime's runtime where a failure to instantiate an instance for a module that defines an `externref` global will result in an invalid drop of a `VMExternRef` via an uninitialized pointer. A number of conditions listed in the GitHub Security Advisory must be true in order for an instance to be vulnerable to this issue. Maintainers believe that the effective impact of this bug is relatively small because the usage of `externref` is still uncommon and without a resource limiter configured on the `Store`, which is not the default configuration, it is only possible to trigger the bug from an error returned by `mprotect` or `VirtualAlloc`. Note that on Linux with the `uffd` feature enabled, it is only possible to trigger the bug from a resource limiter as the call to `mprotect` is skipped. • https://github.com/bytecodealliance/wasmtime/commit/886ecc562040bef61faf19438c22285c2d62403a https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-88xq-w8cq-xfg7 • CWE-824: Access of Uninitialized Pointer •