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CVE-2025-38679

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: media: venus: Fix OOB read due to missing payload bound check Currently, The event_seq_changed() handler processes a variable number of properties sent by the firmware. The number of properties is indicated by the firmware and used to iterate over the payload. However, the payload size is not being validated against the actual message length. This can lead to out-of-bounds memory access if the firmware provides a property count that exceeds the data available in the payload. Such a condition can result in kernel crashes or potential information leaks if memory beyond the buffer is accessed. Fix this by properly validating the remaining size of the payload before each property access and updating bounds accordingly as properties are parsed. This ensures that property parsing is safely bounded within the received message buffer and protects against malformed or malicious firmware behavior.

Severity
HIGH
CVSS score
7.1 (v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-09-04 16:15:35.387000
Last modified
2026-10-19 21:10:00.160000
View original CVE JSON 
{
  "id": "CVE-2025-38679",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-09-04T16:15:35.387",
  "lastModified": "2026-10-19T21:10:00.160",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: venus: Fix OOB read due to missing payload bound check\n\nCurrently, The event_seq_changed() handler processes a variable number\nof properties sent by the firmware. The number of properties is indicated\nby the firmware and used to iterate over the payload. However, the\npayload size is not being validated against the actual message length.\n\nThis can lead to out-of-bounds memory access if the firmware provides a\nproperty count that exceeds the data available in the payload. Such a\ncondition can result in kernel crashes or potential information leaks if\nmemory beyond the buffer is accessed.\n\nFix this by properly validating the remaining size of the payload before\neach property access and updating bounds accordingly as properties are\nparsed.\n\nThis ensures that property parsing is safely bounded within the received\nmessage buffer and protects against malformed or malicious firmware\nbehavior."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmedia: venus: Corrección de lectura fuera de límites debido a la falta de comprobación de límites de la carga útil\n\nActualmente, el gestor event_seq_changed() procesa un número variable de propiedades enviadas por el firmware. El número de propiedades es indicado por el firmware y se utiliza para iterar sobre la carga útil. Sin embargo, el tamaño de la carga útil no está siendo validado contra la longitud real del mensaje.\n\nEsto puede llevar a un acceso a memoria fuera de límites si el firmware proporciona un recuento de propiedades que excede los datos disponibles en la carga útil. Tal condición puede resultar en fallos del kernel o posibles fugas de información si se accede a memoria más allá del búfer.\n\nCorrija esto al validar correctamente el tamaño restante de la carga útil antes de cada acceso a la propiedad y actualizando los límites en consecuencia a medida que se analizan las propiedades.\n\nEsto asegura que el análisis de propiedades esté acotado de forma segura dentro del búfer de mensajes recibido y protege contra el comportamiento de firmware malformado o malicioso."
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          "product": "SIMATIC CN 4100",
          "defaultStatus": "unknown",
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