What is the severity of CVE-2025-22049?

CVE-2025-22049 is classified as a high severity vulnerability in the Linux kernel due to potential data corruption from improper data buffer alignment.

How do I fix CVE-2025-22049?

To fix CVE-2025-22049, it is recommended to update the Linux kernel to the latest version that addresses this vulnerability.

Which systems are affected by CVE-2025-22049?

CVE-2025-22049 affects systems running the Linux kernel, particularly those utilizing LoongArch-specific devices.

What is ARCH_DMA_MINALIGN in CVE-2025-22049?

ARCH_DMA_MINALIGN is a kernel parameter that specifies the minimum alignment for direct memory access operations, which is set to 1 by default in this vulnerability.

What types of attacks can exploit CVE-2025-22049?

Exploitation of CVE-2025-22049 can lead to denial-of-service attacks or data corruption due to improper alignment of data buffers.

Vulnerability/
CVE-2025-22049

16/4/2025

30/4/2025

CVE-2025-22049: LoongArch: Increase ARCH_DMA_MINALIGN up to 16

First published: Wed Apr 16 2025(Updated: )

In the Linux kernel, the following vulnerability has been resolved: LoongArch: Increase ARCH_DMA_MINALIGN up to 16 ARCH_DMA_MINALIGN is 1 by default, but some LoongArch-specific devices (such as APBDMA) require 16 bytes alignment. When the data buffer length is too small, the hardware may make an error writing cacheline. Thus, it is dangerous to allocate a small memory buffer for DMA. It's always safe to define ARCH_DMA_MINALIGN as L1_CACHE_BYTES but unnecessary (kmalloc() need small memory objects). Therefore, just increase it to 16.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected Software	Affected Version	How to fix
Linux Kernel

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Frequently Asked Questions

What is the severity of CVE-2025-22049?
CVE-2025-22049 is classified as a high severity vulnerability in the Linux kernel due to potential data corruption from improper data buffer alignment.
How do I fix CVE-2025-22049?
To fix CVE-2025-22049, it is recommended to update the Linux kernel to the latest version that addresses this vulnerability.
Which systems are affected by CVE-2025-22049?
CVE-2025-22049 affects systems running the Linux kernel, particularly those utilizing LoongArch-specific devices.
What is ARCH_DMA_MINALIGN in CVE-2025-22049?
ARCH_DMA_MINALIGN is a kernel parameter that specifies the minimum alignment for direct memory access operations, which is set to 1 by default in this vulnerability.
What types of attacks can exploit CVE-2025-22049?
Exploitation of CVE-2025-22049 can lead to denial-of-service attacks or data corruption due to improper alignment of data buffers.

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Frequently Asked Questions

What is the severity of CVE-2025-22049?
CVE-2025-22049 is classified as a high severity vulnerability in the Linux kernel due to potential data corruption from improper data buffer alignment.
How do I fix CVE-2025-22049?
To fix CVE-2025-22049, it is recommended to update the Linux kernel to the latest version that addresses this vulnerability.
Which systems are affected by CVE-2025-22049?
CVE-2025-22049 affects systems running the Linux kernel, particularly those utilizing LoongArch-specific devices.
What is ARCH_DMA_MINALIGN in CVE-2025-22049?
ARCH_DMA_MINALIGN is a kernel parameter that specifies the minimum alignment for direct memory access operations, which is set to 1 by default in this vulnerability.
What types of attacks can exploit CVE-2025-22049?
Exploitation of CVE-2025-22049 can lead to denial-of-service attacks or data corruption due to improper alignment of data buffers.