p PatchFirst

CVE-2025-8860

CVE-2025-8860 · Qemu-kvm: uefi-vars: information disclosure vulnerability in uefi_vars_write callback

Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.

A flaw was found in QEMU in the uefi-vars virtual device. When the guest writes to register UEFI_VARS_REG_BUFFER_SIZE, the .write callback `uefi_vars_write` is invoked. The function allocates a heap buffer without zeroing the memory, leaving the buffer filled with residual data from prior allocations. When the guest later reads from register UEFI_VARS_REG_PIO_BUFFER_TRANSFER, the .read callback `uefi_vars_read` returns leftover metadata or other sensitive process memory from the previously allocated buffer, leading to an information disclosure vulnerability.

CVSS 3.3 · Baja · EPSS 0,2% · Corrección disponible

Publicación
Actualización

Pila tecnológica: system

Productos y versiones afectados

Fuentes originales

Comprueba tu servidor →