CVE-2024-46794

LOW EPSS 9.9%
Published Sep 18, 20241y ago · Modified Jun 17, 20262w ago
3.3 CVSS 3.1
Low
Find Similar
Published Sep 18, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
3.3
Exploitability
1.8
Impact
1.4
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
9.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel* ≤5.19
linuxlinux_kernel*≥6.1  –  <6.1.110
linuxlinux_kernel*≥6.6  –  <6.6.51
linuxlinux_kernel*≥6.10  –  <6.10.10
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/26c6af49d26ffc377e392e30d4086db19eed0ef7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b55ce742afcb8e8189d82f2f1e635ba1b5a461fa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b6fb565a2d15277896583d471b21bc14a0c99661
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ef00818c50cf55a3a56bd9a9fae867c92dfb84e7
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/26c6af49d26ffc377e392e30d4086db19eed0ef7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b55ce742afcb8e8189d82f2f1e635ba1b5a461fa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b6fb565a2d15277896583d471b21bc14a0c99661
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ef00818c50cf55a3a56bd9a9fae867c92dfb84e7
    Patch