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Vulnerability DatabaseCVE-2022-50023
CVE-2022-50023:
Linux Kernel vulnerability analysis and mitigation
Overview
In the Linux kernel, a vulnerability (CVE-2022-50023) was identified in the DMA engine's AXI DMA controller. The issue occurs when a channel has no descriptor and an interrupt is raised, causing the kernel to OOPS. This vulnerability affects various Linux distributions including Debian bullseye and bookworm releases (Debian Tracker).
Technical details
The vulnerability exists in the dmaengine subsystem, specifically in the Synopsys DesignWare AXI DMA controller (dw-axi-dmac). The issue manifests when the handler axichanblockxfercomplete() is called without checking the result of vchannextdesc(), leading to a kernel OOPS condition (NVD).
Impact
When exploited, this vulnerability causes the Linux kernel to OOPS, potentially leading to system instability or denial of service conditions (Wiz).
Mitigation and workarounds
The vulnerability has been fixed in newer kernel versions. Debian has addressed this in bookworm (6.1.137-1) and later versions. The fix involves adding a check for the result of vchannextdesc() in the handler axichanblockxfercomplete() (Debian Tracker).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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