Linux kernel: rfkill event overflow OOM vulnerability
CVE-2026-31670 Published on April 24, 2026
net: rfkill: prevent unlimited numbers of rfkill events from being created
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.
Products Associated with CVE-2026-31670
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Affected Versions
Linux:- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 4bcd1615a4e2a185ae9edd27b4143d7dfa7134f4 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below b1e0c8d3ab58a0161db487bf5fc47adfcaf5d5ca is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below e3842779547c83150569071d9980517cc9029fc0 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 673d2a3eef6e0ee9736501a150c9e4024a4e60a6 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 82843afc19012a29ba863961ef494165aa1a88f4 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below a8c26800e0220e1550af012f5a20e50f5c78864d is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 80ce4cb026f0a4c4532b6cad827b44debda6256a is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below ea245d78dec594372e27d8c79616baf49e98a4a1 is affected.
- Version 5.10.253, <= 5.10.* is unaffected.
- Version 5.15.203, <= 5.15.* is unaffected.
- Version 6.1.169, <= 6.1.* is unaffected.
- Version 6.6.135, <= 6.6.* is unaffected.
- Version 6.12.82, <= 6.12.* is unaffected.
- Version 6.18.23, <= 6.18.* is unaffected.
- Version 6.19.13, <= 6.19.* is unaffected.
- Version 7.0, <= * is unaffected.