CVE-2024-47727

HIGH EPSS 15.8%
Published Oct 21, 20241y ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Oct 21, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
15.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-754

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥5.19  –  <6.1.113
linuxlinux_kernel*≥6.2  –  <6.6.54
linuxlinux_kernel*≥6.7  –  <6.10.13
linuxlinux_kernel*≥6.11  –  <6.11.2

References 6

  • git.kernel.org https://git.kernel.org/stable/c/18ecd5b74682839e7cdafb7cd1ec106df7baa18c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/25703a3c980e21548774eea8c8a87a75c5c8f58c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4c0c5dcb5471de5fc8f0a1c4980e5815339e1cee
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bca2e29f7e26ce7c3522f8b324c0bd85612f68e3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d4fc4d01471528da8a9797a065982e05090e1d81
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/18ecd5b74682839e7cdafb7cd1ec106df7baa18c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/25703a3c980e21548774eea8c8a87a75c5c8f58c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4c0c5dcb5471de5fc8f0a1c4980e5815339e1cee
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bca2e29f7e26ce7c3522f8b324c0bd85612f68e3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d4fc4d01471528da8a9797a065982e05090e1d81
    Patch