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 get_user() or put_user() 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
Configurations
Configuration 1 (hide)
|
History
23 Oct 2024, 20:32
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-754 | |
| References | () https://git.kernel.org/stable/c/18ecd5b74682839e7cdafb7cd1ec106df7baa18c - Patch | |
| References | () https://git.kernel.org/stable/c/4c0c5dcb5471de5fc8f0a1c4980e5815339e1cee - Patch | |
| References | () https://git.kernel.org/stable/c/25703a3c980e21548774eea8c8a87a75c5c8f58c - Patch | |
| References | () https://git.kernel.org/stable/c/bca2e29f7e26ce7c3522f8b324c0bd85612f68e3 - Patch | |
| References | () https://git.kernel.org/stable/c/d4fc4d01471528da8a9797a065982e05090e1d81 - Patch | |
| First Time |
Linux
Linux linux Kernel |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
21 Oct 2024, 13:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-10-21 13:15
Updated : 2024-10-23 20:32
NVD link : CVE-2024-47727
Mitre link : CVE-2024-47727
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-754
Improper Check for Unusual or Exceptional Conditions