References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Change History

In the Linux kernel, the following vulnerability has been resolved:

x86/tdx: Fix data leak in mmio_read()

The mmio_read() function makes a TDVMCALL to retrieve MMIO data for an
address from the VMM.

Sean noticed that mmio_read() unintentionally exposes the value of an
initialized variable (val) on the stack to the VMM.

This variable is only needed as an output value. It did not need to be
passed to the VMM in the first place.

Do not send the original value of *val to the VMM.

[ dhansen: cl

kernel.org https://git.kernel.org/stable/c/26c6af49d26ffc377e392e30d4086db19eed0ef7 [No types assigned]

kernel.org https://git.kernel.org/stable/c/b55ce742afcb8e8189d82f2f1e635ba1b5a461fa [No types assigned]

kernel.org https://git.kernel.org/stable/c/b6fb565a2d15277896583d471b21bc14a0c99661 [No types assigned]

kernel.org https://git.kernel.org/stable/c/ef00818c50cf55a3a56bd9a9fae867c92dfb84e7 [No types assigned]