CVE-2024-47667
Linux Kernel vulnerability analysis and mitigation

Overview

CVE-2024-47667 affects the Linux kernel's PCI keystone driver. The vulnerability is related to Errata #i2037 in AM65x/DRA80xM Processors Silicon Revision 1.0, where inbound PCIe TLP spanning more than two internal AXI 128-byte bursts can cause packet payload corruption and system hangs. The issue was discovered and disclosed in October 2024 (NVD).

Technical details

The vulnerability occurs when an inbound PCIe TLP (Transaction Layer Packet) spans more than two internal AXI 128-byte bursts in the AM65x SR 1.0 hardware. This can lead to bus corruption of the packet payload. The issue has a CVSS v3.1 base score of 5.5 (Medium) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (NVD).

Impact

When exploited, this vulnerability can cause packet payload corruption and system hangs, potentially affecting associated applications and the processor's stability. The impact is primarily on system availability, with no direct impact on confidentiality or integrity (NVD).

Mitigation and workarounds

The workaround implemented in the Linux kernel limits the maximum read request size and maximum payload size to 128 bytes for affected devices. This fix has been applied through patches in various kernel versions. The issue is fixed in later versions of the AM65x silicon (Kernel Patch).

Additional resources


SourceThis report was generated using AI

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