CVE-2022-42331 (fedora, xen)

x86: speculative vulnerability in 32bit SYSCALL path Due to an oversight in the very original Spectre/Meltdown security work (XSA-254), one entrypath performs its speculation-safety actions too late. In some configurations, there is an unprotected RET instruction which can be attacked with a variety of speculative attacks.

32bit actions attacks cve fedora meltdown path safety security spectre syscall vulnerability work x86 xen