Description
A vulnerability was determined in WebAssembly Binaryen up to 125. Affected by this issue is the function WasmBinaryReader::readExport of the file src/wasm/wasm-binary.cpp. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. Patch name: 4f52bff8c4075b5630422f902dd92a0af2c9f398. It is recommended to apply a patch to fix this issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| WebAssembly | Binaryen | 125 | — |
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 | binaryen | 130-2 | — |
| Debian 13 | binaryen | No fix yet | — |
| Debian 12 | binaryen | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | binaryen | No fix yet | — |
| Ubuntu 26.04 LTS | binaryen | No fix yet | — |
| Ubuntu 25.10 | binaryen | No fix yet | — |
| Ubuntu 24.04 LTS | binaryen | No fix yet | — |
| Ubuntu 22.04 LTS | binaryen | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | binaryen | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | binaryen | 133-1.1 | openSUSE-SU-2026:11915-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | binaryen | 129-r0 | — |
Advisories 1
- openSUSE-SU-2026:11915-1 binaryen-133-1.1 on GA media SUSE / openSUSE Security Updates · Sep 30, 2026
References
- VDB-337592 | WebAssembly Binaryen wasm-binary.cpp readExport heap-based overflow vdb-entry technical-description
- VDB-337592 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #717315 | WebAssembly binaryen 9a226ac Heap-based Buffer Overflow third-party-advisory
- https://github.com/WebAssembly/binaryen/issues/8089 issue-tracking
- https://github.com/WebAssembly/binaryen/pull/8092 issue-tracking
- https://github.com/oneafter/1204/blob/main/hbf exploit
- https://github.com/WebAssembly/binaryen/commit/4f52bff8c4075b5630422f902dd92a0af2c9f398 patch
- https://github.com/WebAssembly/binaryen/ product