CVE-2024-47727

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Source
https://nvd.nist.gov/vuln/detail/CVE-2024-47727
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-47727.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-47727
Downstream
Related
Published
2024-10-21T13:15:02Z
Modified
2025-08-09T19:01:28Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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

x86/tdx: Fix "in-kernel MMIO" check

TDX only supports kernel-initiated MMIO operations. The handle_mmio() function checks if the #VE exception occurred in the kernel and rejects the operation if it did not.

However, userspace can deceive the kernel into performing MMIO on its behalf. For example, if userspace can point a syscall to an MMIO address, syscall does getuser() or putuser() on it, triggering MMIO #VE. The kernel will treat the #VE as in-kernel MMIO.

Ensure that the target MMIO address is within the kernel before decoding instruction.

References

Affected packages