CVE-2023-52882

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: clk: sunxi-ng: h6: CPUX reparent durante el cambio de velocidad de CPUX de PLL. Mientras que el cambio de velocidad de reloj de CPUX de PLL cuando la CPU se está ejecutando, funciona en la gran mayoría de los casos, de vez en cuando provoca inestabilidad. Esto provoca fallos del sistema y otros comportamientos indefinidos. Después de muchas pruebas (más de 30 horas) y al mismo tiempo realizar muchos cambios de frecuencia, ya no podemos observar ningún problema de inestabilidad al realizar la reparación a un reloj estable como un oscilador de 24 MHz.

In the Linux kernel, the following vulnerability has been resolved: clk: sunxi-ng: h6: Reparent CPUX during PLL CPUX rate change While PLL CPUX clock rate change when CPU is running from it works in vast majority of cases, now and then it causes instability. This leads to system crashes and other undefined behaviour. After a lot of testing (30+ hours) while also doing a lot of frequency switches, we can't observe any instability issues anymore when doing reparenting to stable clock like 24 MHz oscillator.

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.