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CVE-2024-46794 Affecting kernel-core package, versions *

Severity

 Recommended
low

Based on Red Hat Enterprise Linux security rating

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  • Snyk ID SNYK-RHEL9-KERNELCORE-8057623
  • published 19 Sep 2024
  • disclosed 18 Sep 2024
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Introduced: 18 Sep 2024

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How to fix?

There is no fixed version for RHEL:9 kernel-core.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-core package and not the kernel-core package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

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 Scores

version 3.1
Expand this section

Red Hat

5.5 medium
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High