CVE-2024-26659 Affecting kernel-rt-core package, versions <0:4.18.0-553.5.1.rt7.346.el8_10


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-ALMALINUX8-KERNELRTCORE-7215713
  • published5 Jun 2024
  • disclosed5 Jun 2024

Introduced: 5 Jun 2024

CVE-2024-26659  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 kernel-rt-core to version 0:4.18.0-553.5.1.rt7.346.el8_10 or higher.
This issue was patched in ALSA-2024:3627.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-core package and not the kernel-rt-core package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

xhci: handle isoc Babble and Buffer Overrun events properly

xHCI 4.9 explicitly forbids assuming that the xHC has released its ownership of a multi-TRB TD when it reports an error on one of the early TRBs. Yet the driver makes such assumption and releases the TD, allowing the remaining TRBs to be freed or overwritten by new TDs.

The xHC should also report completion of the final TRB due to its IOC flag being set by us, regardless of prior errors. This event cannot be recognized if the TD has already been freed earlier, resulting in "Transfer event TRB DMA ptr not part of current TD" error message.

Fix this by reusing the logic for processing isoc Transaction Errors. This also handles hosts which fail to report the final completion.

Fix transfer length reporting on Babble errors. They may be caused by device malfunction, no guarantee that the buffer has been filled.

CVSS Scores

version 3.1