CVE-2024-46794

LowCVSS 3.3/10Last modified Jun 17, 2026

Description

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: clarify what 'val' is used for. ]

Metrics

CVSS 3.1 3.3/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected software

No affected versions have been published.

Timeline

Published
Sep 18, 2024
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2024-46794: Low severity, CVSS 3.3 | Vulnix