CVE-2024-47727 (GCVE-0-2024-47727)

Vulnerability from cvelistv5 – Published: 2024-10-21 12:14 – Updated: 2025-11-03 22:21
VLAI?
Title
x86/tdx: Fix "in-kernel MMIO" check
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 31d58c4e557d46fa7f8557714250fb6f89c941ae , < 25703a3c980e21548774eea8c8a87a75c5c8f58c (git)
Affected: 31d58c4e557d46fa7f8557714250fb6f89c941ae , < 4c0c5dcb5471de5fc8f0a1c4980e5815339e1cee (git)
Affected: 31d58c4e557d46fa7f8557714250fb6f89c941ae , < 18ecd5b74682839e7cdafb7cd1ec106df7baa18c (git)
Affected: 31d58c4e557d46fa7f8557714250fb6f89c941ae , < bca2e29f7e26ce7c3522f8b324c0bd85612f68e3 (git)
Affected: 31d58c4e557d46fa7f8557714250fb6f89c941ae , < d4fc4d01471528da8a9797a065982e05090e1d81 (git)
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    Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.113 , ≤ 6.1.* (semver)
Unaffected: 6.6.54 , ≤ 6.6.* (semver)
Unaffected: 6.10.13 , ≤ 6.10.* (semver)
Unaffected: 6.11.2 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.