7.8

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

Modified
AliasesUBUNTU-CVE-2025-22049DEBIAN-CVE-2025-22049
Published 16-04-2025Last modified 05-08-2026

Vulnerability summary

CVE-2025-22049 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4
DLA-4193-1DSA-5907-1MGASA-2025-0142MGASA-2025-0146

Timeline

  1. 16-04-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.21% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu83 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ fa96b57c149061f71a70bd6582d995f6424fbbf4, < f39af67f03b564b763b06e44cb960c10a382d54a | ≥ fa96b57c149061f71a70bd6582d995f6424fbbf4, < 279ec25c2df49fba1cd9488f2ddd045d9cb2112e | ≥ fa96b57c149061f71a70bd6582d995f6424fbbf4, < 1d0def2d1658666ec1f32c9495df60e7411e3c82 | ≥ fa96b57c149061f71a70bd6582d995f6424fbbf4, < bfff341cac7c650e6ca8d10503725992f5564d0f | ≥ fa96b57c149061f71a70bd6582d995f6424fbbf4, < 8b82aea3666f8f2c78f86148d78aea99c46e0f82 | ≥ fa96b57c149061f71a70bd6582d995f6424fbbf4, < 4103cfe9dcb88010ae4911d3ff417457d1b6a720 | 5.19
  • linux_kernel≥ 5.19, < 6.1.134 | ≥ 6.2, < 6.6.87 | ≥ 6.7, < 6.12.23 | ≥ 6.13, < 6.13.11 | ≥ 6.14, < 6.14.2
Debian1 product
  • linux< 6.1.135-1 | < 6.12.25-1

3 vendors · 86 products

References

12 links
Show all 12 references