CVE-2024-38614

En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: openrisc: trampas: no envía señales a subprocesos en modo kernel. El manejo de excepciones de OpenRISC envía señales a los procesos del usuario sobre excepciones de punto flotante e instrucciones de captura (para depuración), entre otros. Hay un error en el que la lógica de manejo de trampas puede enviar señales a los subprocesos del kernel. No debemos enviar estas señales a los subprocesos del kernel; si eso sucede, lo tratamos como un error. Este parche agrega condiciones para morir si el kernel recibe estas excepciones en el código del modo kernel.

In the Linux kernel, the following vulnerability has been resolved: openrisc: traps: Don't send signals to kernel mode threads OpenRISC exception handling sends signals to user processes on floating point exceptions and trap instructions (for debugging) among others. There is a bug where the trap handling logic may send signals to kernel threads, we should not send these signals to kernel threads, if that happens we treat it as an error. This patch adds conditions to die if the kernel receives these exceptions in kernel mode code.

Benedict Schlüter, Supraja Sridhara, Andrin Bertschi, and Shweta Shinde discovered that an untrusted hypervisor could inject malicious #VC interrupts and compromise the security guarantees of AMD SEV-SNP. This flaw is known as WeSee. A local attacker in control of the hypervisor could use this to expose sensitive information or possibly execute arbitrary code in the trusted execution environment. Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.