CVE-2026-24116
CVE-2026-24116 · Wasmtime segfault or unused out-of-sandbox load with f64.copysign operator on x86-64
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
Wasmtime is a runtime for WebAssembly. Starting in version 29.0.0 and prior to version 36.0.5, 40.0.3, and 41.0.1, on x86-64 platforms with AVX, Wasmtime's compilation of the `f64.copysign` WebAssembly instruction with Cranelift may load 8 more bytes than is necessary. When signals-based-traps are disabled this can result in a uncaught segfault due to loading from unmapped guard pages. With guard pages disabled it's possible for out-of-sandbox data to be loaded, but unless there is another bug in Cranelift this data is not visible to WebAssembly guests. Wasmtime 36.0.5, 40.0.3, and 41.0.1 have been released to fix this issue. Users are recommended to upgrade to the patched versions of Wasmtime. Other affected versions are not patched and users should updated to supported major version instead. This bug can be worked around by enabling signals-based-traps. While disabling guard pages can be a quick fix in some situations, it's not recommended to disabled guard pages as it is a key defense-in-depth measure of Wasmtime.
CVSS 4.1 · Media · EPSS 0,2% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: system
Productos y versiones afectados
wasmtime
- Versiones
- >= 29.0.0, < 36.0.5: Afectada
- >= 37.0.0, < 40.0.3: Afectada
- = 41.0.0: Afectada
Sin corrección publicada
rust-wasmtime Debian:14
- Versiones
- 26.0.1+dfsg-10
- 26.0.1+dfsg-3
- 26.0.1+dfsg-4
- 26.0.1+dfsg-5
- 26.0.1+dfsg-6
- 26.0.1+dfsg-7
- 26.0.1+dfsg-8
- 26.0.1+dfsg-9
- 27.0.0+dfsg-2
- 27.0.0+dfsg-3
- 27.0.0+dfsg-4
- 28.0.1+dfsg-1
- 28.0.1+dfsg-2
- 28.0.1+dfsg-3
- 29.0.1+dfsg-1
- 29.0.1+dfsg-2
- 29.0.1+dfsg-3
- 29.0.1+dfsg-4
- 29.0.1+dfsg-5
- 29.0.1+dfsg-6
- 29.0.1+dfsg-7
- 29.0.1+dfsg-8
- Intervalos de versiones afectados
- ECOSYSTEM: < 36.0.5+dfsg-1
Actualiza a 36.0.5+dfsg-1
rust-wasmtime Ubuntu:24.04:LTS
- Versiones
- 10.0.1+dfsg-7
- 15.0.1+dfsg-4
- 16.0.0+dfsg-2
- 16.0.0+dfsg-3
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
rust-wasmtime Ubuntu:25.10
- Versiones
- 26.0.1+dfsg-3
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
rust-wasmtime Ubuntu:26.10
- Versiones
- 36.0.5+dfsg-1
- 36.0.13+dfsg-1
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
rust-wasmtime Ubuntu:26.04:LTS
- Versiones
- 26.0.1+dfsg-3
- 26.0.1+dfsg-4
- 28.0.1+dfsg-3
- 29.0.1+dfsg-5
- 36.0.5+dfsg-1
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
Fuentes originales
- https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-vc8c-j3xm-xj73
- https://github.com/bytecodealliance/wasmtime/commit/728fa07184f8da2a046f48ef9b61f869dce133a6
- https://github.com/bytecodealliance/wasmtime/commit/799585fc362fcb991de147dd1a9f2ba0861ed440
- https://github.com/bytecodealliance/wasmtime/commit/ac92d9bb729ad3a6d93f0724c4c33a0c4a9c0227
- https://docs.rs/wasmtime/latest/wasmtime/struct.Config.html#method.memory_guard_size
- https://docs.rs/wasmtime/latest/wasmtime/struct.Config.html#method.signals_based_traps
- https://docs.wasmtime.dev/stability-release.html
- https://rustsec.org/advisories/RUSTSEC-2026-0006.html
- https://nvd.nist.gov/vuln/detail/CVE-2026-24116