CVE-2023-52493

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bus: mhi: host: Eliminar el bloqueo de canal antes de poner en cola los búferes asegúrese de que los bloqueos de lectura y escritura para el canal no se tomen en sucesión eliminando el bloqueo de lectura de parse_xfer_event() de manera que se pueda realizar una devolución de llamada dado al cliente puede potencialmente poner en cola los búferes y adquirir el bloqueo de escritura en ese proceso. Cualquier puesta en cola de búferes debe realizarse sin adquirir el bloqueo de lectura del canal, ya que puede generar múltiples bloqueos y un bloqueo suave. [mani: etiqueta de correcciones agregada y copia estable]

In the Linux kernel, the following vulnerability has been resolved: bus: mhi: host: Drop chan lock before queuing buffers Ensure read and write locks for the channel are not taken in succession by dropping the read lock from parse_xfer_event() such that a callback given to client can potentially queue buffers and acquire the write lock in that process. Any queueing of buffers should be done without channel read lock acquired as it can result in multiple locks and a soft lockup. [mani: added fixes tag and cc'ed stable]

It was discovered that the Open vSwitch implementation in the Linux kernel could overflow its stack during recursive action operations under certain conditions. A local attacker could use this to cause a denial of service. Sander Wiebing, Alvise de Faveri Tron, Herbert Bos, and Cristiano Giuffrida discovered that the Linux kernel mitigations for the initial Branch History Injection vulnerability were insufficient for Intel processors. A local attacker could potentially use this to expose sensitive information.