8.8

CVE-2026-64280: fpga: dfl-afu: validate DMA mapping length in afu_dma_map_region()

Modified
AliasesUBUNTU-CVE-2026-64280DEBIAN-CVE-2026-64280
Published 25-07-2026Last modified 23-08-2026

Vulnerability summary

CVE-2026-64280 is a high (CVSS 8.8) vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
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 25 · Related 25
OPENSUSE-SU-2026:11476-1OPENSUSE-SU-2026:22167-1SUSE-SU-2026:24371-1SUSE-SU-2026:24379-1SUSE-SU-2026:24386-1SUSE-SU-2026:24422-1

Timeline

  1. 25-07-2026
    PublishedVulnerability first disclosed.
  2. 23-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: fpga: dfl-afu: validate DMA mapping length in afu_dma_map_region() afu_ioctl_dma_map() accepts a 64-bit length from userspace via DFL_FPGA_PORT_DMA_MAP ioctl without an upper bound check. The value is passed to afu_dma_pin_pages() where npages is derived as length >> PAGE_SHIFT and passed to pin_user_pages_fast() which takes int nr_pages, causing implicit truncation if length is very large. Validate map.length at the ioctl entry point before calling afu_dma_map_region(), rejecting values whose page count exceeds INT_MAX.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.17% 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.

Ubuntu165 products
  • linuxAll versions (No fix recorded) | < 6.8.0-147.147 | < 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1067.70 | < 7.0.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.101-1 | < 7.1.4-1
  • linux-6.12< 6.12.101-1~deb12u1
Linux2 products
  • linux≥ fa8dda1edef9ebc3af467c644c5533ac97171e12, < 5352d488ce4ae5e8c68c080ad4c3a5f084ad5fbc | ≥ fa8dda1edef9ebc3af467c644c5533ac97171e12, < d7e787eee2ea619b6dbb98890472ee73daf2e7fd | ≥ fa8dda1edef9ebc3af467c644c5533ac97171e12, < a6a3884ff500f04f3088d6d09eec803cd35331a2 | ≥ fa8dda1edef9ebc3af467c644c5533ac97171e12, < 16381bda90b261a656ded0568630c1b857b2ebc8 | ≥ fa8dda1edef9ebc3af467c644c5533ac97171e12, < b50e6cd2395cde615f59b624819998d28c0668d6 | ≥ fa8dda1edef9ebc3af467c644c5533ac97171e12, < 59070040fd12e0b78d7b4d341d9f9a183237c5ff | ≥ fa8dda1edef9ebc3af467c644c5533ac97171e12, < fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231 | ≥ fa8dda1edef9ebc3af467c644c5533ac97171e12, < fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27 | 4.19
  • linux_kernel≥ 4.19, < 6.6.148 | ≥ 6.7, < 6.12.101 | ≥ 6.13, < 6.18.39 | ≥ 6.19, < 7.1.4

3 vendors · 169 products

References

26 links
Show all 26 references