CVE-2026-54914

Gravedad CVSS v4.0:

ALTA

Tipo:

CWE-122 Desbordamiento de búfer basado en memoria dinámica (Heap)

Fecha de publicación:

05/11/2026

Última modificación:

05/11/2026

Descripción

*** Pendiente de traducción *** WebAssembly Micro Runtime (WAMR) is a lightweight standalone WebAssembly (Wasm) runtime. Prior to 2.4.5, wasi_poll_oneoff in core/iwasm/libraries/libc-wasi/libc_wasi_wrapper.c validates the output pointer for only one wasi_event_t, while wasmtime_ssp_poll_oneoff in core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.c can write as many events as the guest-controlled nsubscriptions value. A crafted guest module can provide multiple subscriptions that produce events while positioning an output region large enough for only one event, causing a later out[nevents] write to cross the validated Wasm linear-memory boundary into adjacent host heap memory. The overwrite contains partly attacker-controlled event data and can reliably crash the host process, with further confidentiality or integrity consequences depending on heap layout. This issue is fixed in version 2.4.5.

Impacto

Vector 4.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N CVSS v4.0 Severidad y Métricas:

Puntuación base: 8.30 ALTA
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

Vector de acceso (AV): A través de red
Complejidad de acceso (AC): Bajo
Attack Requirements (AT): Present
Privilegios Requeridos (PR): Ninguno
Interacción del usuario (UI): Ninguno
Confidentiality (VC): Bajo
Integrity (VI): Bajo
Availability (VA): Alto
Confidentiality (SC): Ninguno
Integrity (SI): Ninguno
Availability (SA): Ninguno

Puntuación base 4.0

8.30

Gravedad 4.0

ALTA

CVE-2026-54914

Descripción

Impacto

Referencias a soluciones, herramientas e información