CVE-2024-36923

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fs/9p: corrige valores no inicializados durante el desalojo de inodo. Si un iget falla debido a que no puede recuperar información del servidor, entonces la estructura del inodo solo se inicializa parcialmente. Cuando se expulsa el inodo, se hacían referencias a estructuras no inicializadas (como cookies fscache). Este parche busca un bad_inode antes de hacer cualquier otra cosa que no sea borrar el inodo del caché. Dado que el inodo es malo, no debería tener ningún estado asociado que deba reescribirse (y realmente no hay una manera de completarlo de todos modos).

In the Linux kernel, the following vulnerability has been resolved: fs/9p: fix uninitialized values during inode evict If an iget fails due to not being able to retrieve information from the server then the inode structure is only partially initialized. When the inode gets evicted, references to uninitialized structures (like fscache cookies) were being made. This patch checks for a bad_inode before doing anything other than clearing the inode from the cache. Since the inode is bad, it shouldn't have any state associated with it that needs to be written back (and there really isn't a way to complete those anyways).

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.