CVE-2024-47727

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.

Reserved 2024-09-30 | Published 2024-10-21 | Updated 2024-12-19 | Assigner Linux

Product status

Default status
unaffected

31d58c4e557d46fa7f8557714250fb6f89c941ae before 25703a3c980e21548774eea8c8a87a75c5c8f58c
affected

31d58c4e557d46fa7f8557714250fb6f89c941ae before 4c0c5dcb5471de5fc8f0a1c4980e5815339e1cee
affected

31d58c4e557d46fa7f8557714250fb6f89c941ae before 18ecd5b74682839e7cdafb7cd1ec106df7baa18c
affected

31d58c4e557d46fa7f8557714250fb6f89c941ae before bca2e29f7e26ce7c3522f8b324c0bd85612f68e3
affected

31d58c4e557d46fa7f8557714250fb6f89c941ae before d4fc4d01471528da8a9797a065982e05090e1d81
affected

Default status
affected

5.19
affected

Any version before 5.19
unaffected

6.1.113
unaffected

6.6.54
unaffected

6.10.13
unaffected

6.11.2
unaffected

6.12
unaffected

References

git.kernel.org/...c/25703a3c980e21548774eea8c8a87a75c5c8f58c

git.kernel.org/...c/4c0c5dcb5471de5fc8f0a1c4980e5815339e1cee

git.kernel.org/...c/18ecd5b74682839e7cdafb7cd1ec106df7baa18c

git.kernel.org/...c/bca2e29f7e26ce7c3522f8b324c0bd85612f68e3

git.kernel.org/...c/d4fc4d01471528da8a9797a065982e05090e1d81

cve.org (CVE-2024-47727)

nvd.nist.gov (CVE-2024-47727)

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