DEBIAN-CVE-2024-47727

Advisory lineage Upstream: 1 Downstream: 1
Upstream
CVE-2024-47727
Downstream
DLA-4008-1
Published: 21 Oct 2024, 13:15
Last modified:28 Apr 2026, 20:28

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

21 Oct 2024, 13:15
Published
Vulnerability first disclosed
28 Apr 2026, 20:28
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Systems

  • debian•linux

    < 6.1.115-1 | < 6.11.2-1 | < 6.11.2-1

  • debian•linux-6.1

    < 6.1.119-1~deb11u1

References (1)