Vulnerability in Linux

CVE-2025-40216

In the Linux kernel, the following vulnerability has been resolved: io_uring/rsrc: don't rely on user vaddr alignment There is no guaranteed alignment for user pointers, however the calculation of an offset of the first page into a folio after coalescing uses some weird bit mask logic, get rid of it.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (3.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-40216: held from 0.001 to 0.001.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

  • Linux — versions a8edbb424b1391b077407c75d8f5d2ede77aa70d, 6.12, 0

References

Frequently asked questions

What is CVE-2025-40216?
CVE-2025-40216 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2025-12-04.
How severe is CVE-2025-40216?
High severity. CVSS v3 base score is 7.8 out of 10.