CVE-2025-22049high

CVE-2025-22049: high-severity vulnerability in Linux

LoongArch: Increase ARCH_DMA_MINALIGN up to 16

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.8epss 0.2%
exploitation probability
0.2%top 89% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · Linux
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References
https://git.kernel.org/stable/c/1d0def2d1658666ec1f32c9495df60e7411e3c82https://git.kernel.org/stable/c/279ec25c2df49fba1cd9488f2ddd045d9cb2112ehttps://git.kernel.org/stable/c/4103cfe9dcb88010ae4911d3ff417457d1b6a720https://git.kernel.org/stable/c/8b82aea3666f8f2c78f86148d78aea99c46e0f82https://git.kernel.org/stable/c/bfff341cac7c650e6ca8d10503725992f5564d0fhttps://git.kernel.org/stable/c/f39af67f03b564b763b06e44cb960c10a382d54ahttps://lists.debian.org/debian-lts-announce/2025/05/msg00045.html