CVE-2024-46794

LOW

Linux Kernel < 5.19 and 5.19.0-6.1.109 and 6.2.0-6.6.50 and 6.7.0-6.10.9 - Information Exposure via TDVMCALL MMIO Read

Title source: llm
STIX 2.1

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. ]

References (5)

Core 5

Scores

CVSS v3 3.3
EPSS 0.0020
EPSS Percentile 10.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

Status published
Products (15)
linux/Kernel 5.19.0 - 6.1.110linux
linux/Kernel 6.2.0 - 6.6.51linux
linux/Kernel 6.7.0 - 6.10.10linux
Linux/Linux < 5.19
Linux/Linux 31d58c4e557d46fa7f8557714250fb6f89c941ae - 26c6af49d26ffc377e392e30d4086db19eed0ef7
Linux/Linux 31d58c4e557d46fa7f8557714250fb6f89c941ae - b55ce742afcb8e8189d82f2f1e635ba1b5a461fa
Linux/Linux 31d58c4e557d46fa7f8557714250fb6f89c941ae - b6fb565a2d15277896583d471b21bc14a0c99661
Linux/Linux 31d58c4e557d46fa7f8557714250fb6f89c941ae - ef00818c50cf55a3a56bd9a9fae867c92dfb84e7
Linux/Linux 5.19
Linux/Linux 6.1.110 - 6.1.*
... and 5 more
Published Sep 18, 2024
Tracked Since Feb 18, 2026