Critical Vulnerability in Linux Package: Error Handling Flaw in DMA Engine
Summary
DEBIAN-CVE-2025-39923: In the Linux kernel, the following vulnerability has been resolved: dmaengine: qcom: bam_dma: Fix DT error handling for num-channels/ees When we don't have a clock specified in the device tree, we have no way to ensure t... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux package is a core component of the Debian operating system, responsible for managing hardware interactions and system resources. It provides essential functionalities that allow the operating system to communicate with various hardware components. This vulnerability specifically affects the DMA engine within the Linux kernel, which is crucial for efficient data transfer between devices. The flaw arises from inadequate error handling in device tree configurations, potentially leading to system crashes.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the DMA engine related to Qualcomm's BAM DMA. The issue stems from the absence of proper error handling when device trees lack necessary properties such as clock specifications and number of channels. This oversight allows the probing process to continue even with invalid configurations, which can lead to unsafe operations and early boot crashes. The vulnerability has been exploited in various Qualcomm SoCs, highlighting the need for immediate attention to prevent system instability.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. However, users are advised to ensure that their device trees are correctly configured and tested to avoid potential crashes.
Conclusion
The identified vulnerability in the Linux package poses significant risks due to improper error handling in the DMA engine. Users are strongly encouraged to update their systems to the latest patched versions to mitigate potential crashes and ensure system stability.
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FAQ
The vulnerability is related to improper error handling in the DMA engine of the Linux kernel, which can lead to system crashes.
Debian 11, 12, 13, and 14 are affected by this vulnerability.
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While there are no specific workarounds, ensure your device trees are properly configured to minimize the risk of crashes.
Detailed information can be found in the CVE report for DEBIAN-CVE-2025-39923.
References
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