CVE-2025-22049

LoongArch: Increase ARCH_DMA_MINALIGN up to 16

State: Published
Severity: 7.8 High
Published: Apr 16, 2025
Updated: Aug 5, 2026
Reserved: Dec 29, 2024

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	fa96b57c149061f71a70bd6582d995f6424fbbf4 to before f39af67f03b564b763b06e44cb960c10a382d54aAffected fa96b57c149061f71a70bd6582d995f6424fbbf4 to before 279ec25c2df49fba1cd9488f2ddd045d9cb2112eAffected fa96b57c149061f71a70bd6582d995f6424fbbf4 to before 1d0def2d1658666ec1f32c9495df60e7411e3c82Affected fa96b57c149061f71a70bd6582d995f6424fbbf4 to before bfff341cac7c650e6ca8d10503725992f5564d0fAffected fa96b57c149061f71a70bd6582d995f6424fbbf4 to before 8b82aea3666f8f2c78f86148d78aea99c46e0f82Affected fa96b57c149061f71a70bd6582d995f6424fbbf4 to before 4103cfe9dcb88010ae4911d3ff417457d1b6a720Affected
LinuxLinux	5.19Affected before 5.19Not affected 6.1.134 through 6.1.Not affected 6.6.87 through 6.6.Not affected 6.12.23 through 6.12.Not affected 6.13.11 through 6.13.Not affected 6.14.2 through 6.14.*Not affected 6.15 and laterNot affected

Product

Versions

LinuxLinux

fa96b57c149061f71a70bd6582d995f6424fbbf4 to before f39af67f03b564b763b06e44cb960c10a382d54aAffected
fa96b57c149061f71a70bd6582d995f6424fbbf4 to before 279ec25c2df49fba1cd9488f2ddd045d9cb2112eAffected
fa96b57c149061f71a70bd6582d995f6424fbbf4 to before 1d0def2d1658666ec1f32c9495df60e7411e3c82Affected
fa96b57c149061f71a70bd6582d995f6424fbbf4 to before bfff341cac7c650e6ca8d10503725992f5564d0fAffected
fa96b57c149061f71a70bd6582d995f6424fbbf4 to before 8b82aea3666f8f2c78f86148d78aea99c46e0f82Affected
fa96b57c149061f71a70bd6582d995f6424fbbf4 to before 4103cfe9dcb88010ae4911d3ff417457d1b6a720Affected

LinuxLinux

5.19Affected
before 5.19Not affected
6.1.134 through 6.1.*Not affected
6.6.87 through 6.6.*Not affected
6.12.23 through 6.12.*Not affected
6.13.11 through 6.13.*Not affected
6.14.2 through 6.14.*Not affected
6.15 and laterNot affected

References

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