Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Fix data leak in mmio_read() The mmio_read() function makes a TDVMCALL to retrieve MMIO data for an address from the VMM. Sean noticed that mmio_read() unintentionally exposes the value of an initialized variable (val) on the stack to the VMM. This variable is only needed as an output value. It did not need to be passed to the VMM in the first place. Do not send the original value of *val to the VMM. [ dhansen: clarify what 'val' is used for. ]
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 5.19 |
References
- https://git.kernel.org/stable/c/26c6af49d26ffc377e392e30d4086db19eed0ef7Patch
- https://git.kernel.org/stable/c/b55ce742afcb8e8189d82f2f1e635ba1b5a461faPatch
- https://git.kernel.org/stable/c/b6fb565a2d15277896583d471b21bc14a0c99661Patch
- https://git.kernel.org/stable/c/ef00818c50cf55a3a56bd9a9fae867c92dfb84e7Patch
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
FAQ
What is CVE-2024-46794?
CVE-2024-46794 is a vulnerability with a CVSS score of 3.3 (LOW). In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Fix data leak in mmio_read() The mmio_read() function makes a TDVMCALL to retrieve MMIO data for an address from the VMM....
How severe is CVE-2024-46794?
CVE-2024-46794 has been rated LOW with a CVSS base score of 3.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-46794?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.