Vulnerability in Linux

CVE-2026-31670

In the Linux kernel, the following vulnerability has been resolved: net: rfkill: prevent unlimited numbers of rfkill events from being created Userspace can create an unlimited number of rfkill events if the system is so configured, while not consuming them from the rfkill file descriptor, causing a potential out of memory situation. Prevent this from bounding the number of pending rfkill events at a "large" number (i.e. 1000) to prevent abuses like this.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (5.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 5.7% 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-2026-31670: held from 0.001 to 0.002.

EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001

Affected products

  • Linux — versions c64fb01627e24725d1f9d535e4426475a4415753, 2.6.31, 0
  • Linux Kernel — versions 2.6.31, 7.0

References

Frequently asked questions

What is CVE-2026-31670?
CVE-2026-31670 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2026-04-24.
How severe is CVE-2026-31670?
Medium severity. CVSS v3 base score is 5.5 out of 10.