Improper Check for Unusual or Exceptional Conditions Affecting kernel-cross-headers package, versions *
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Test your applications- Snyk ID SNYK-RHEL8-KERNELCROSSHEADERS-8283304
- published 23 Oct 2024
- disclosed 21 Oct 2024
Introduced: 21 Oct 2024
CVE-2024-47727 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:8 kernel-cross-headers.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-cross-headers package and not the kernel-cross-headers package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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
- https://access.redhat.com/security/cve/CVE-2024-47727
- https://git.kernel.org/stable/c/18ecd5b74682839e7cdafb7cd1ec106df7baa18c
- https://git.kernel.org/stable/c/25703a3c980e21548774eea8c8a87a75c5c8f58c
- https://git.kernel.org/stable/c/4c0c5dcb5471de5fc8f0a1c4980e5815339e1cee
- https://git.kernel.org/stable/c/bca2e29f7e26ce7c3522f8b324c0bd85612f68e3
- https://git.kernel.org/stable/c/d4fc4d01471528da8a9797a065982e05090e1d81