CVE-2023-52874

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to the x86/tdx component of the Linux kernel, where the TDX HYPERCALL macro fails to zero out the RSI register after the TDCALL instruction returns from the untrusted VMM. This omission could lead to speculative execution of VMM-provided values. The problem arose from a series of commits, where the initial addition of the RSI zeroing was later removed and not reinstated when necessary. The fix involves adding back the zeroing of the RSI register.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.