CVE-2020-10766

A logic bug flaw was found in Linux kernel before 5.8-rc1 in the implementation of SSBD. A bug in the logic handling allows an attacker with a local account to disable SSBD protection during a context switch when additional speculative execution mitigations are in place. This issue was introduced when the per task/process conditional STIPB switching was added on top of the existing SSBD switching. The highest threat from this vulnerability is to confidentiality.

A logic bug flaw was found in Linux kernel before 5.8-rc1 in the implementation of SSBD. A bug in the logic handling allows an attacker with a local account to disable SSBD protection during a context switch when additional speculative execution mitigations are in place. This issue was introduced when the per task/process conditional STIPB switching was added on top of the existing SSBD switching. The highest threat from this vulnerability is to confidentiality.

Se encontró un fallo de bug lógico en el kernel de Linux versiones anteriores a 5.8-rc1, en la implementación de SSBD. Un error en el manejo lógico permite a un atacante con una cuenta local desactivar la protección SSBD durante un cambio de contexto cuando las mitigaciones de ejecución especulativa adicionales están presentes. Este problema fue introducido cuando la conmutación STIPB condicional fue incorporada a la conmutación SSBD existente. La mayor amenaza de esta vulnerabilidad es la confidencialidad