Description
A vulnerability was found in WebAssembly wabt 1.0.36 and classified as critical. This issue affects the function wabt::interp::(anonymous namespace)::BinaryReaderInterp::OnExport of the file wabt/src/interp/binary-reader-interp.cc of the component Malformed File Handler. The manipulation leads to heap-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. It is recommended to apply a patch to fix this issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| WebAssembly | wabt | 1.0.36 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | wabt | No fix yet | — |
| Debian 13 | wabt | No fix yet | — |
| Debian 12 | wabt | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | wabt | No fix yet | — |
| Ubuntu 26.04 LTS | wabt | No fix yet | — |
| Ubuntu 25.10 | wabt | No fix yet | — |
| Ubuntu 24.04 LTS | wabt | No fix yet | — |
| Ubuntu 22.04 LTS | wabt | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | wabt | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | wabt-bin | <= 1.0.36 | — | PYSEC-2025-227 |
References
- VDB-299867 | WebAssembly wabt Malformed File binary-reader-interp.cc OnExport heap-based overflow vdb-entry technical-description
- VDB-299867 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #515327 | https://github.com/WebAssembly/wabt wabt v1.0.36 Heap-based Buffer Overflow third-party-advisory
- https://github.com/WebAssembly/wabt/issues/2556 issue-tracking
- https://github.com/WebAssembly/wabt/issues/2537 issue-tracking
- https://github.com/WebAssembly/wabt/issues/2556#issue-2899598349 exploit issue-tracking
- https://github.com/WebAssembly/wabt/pull/2541 issue-tracking patch