HOMEVULNERABILITIESCVE-2026-31670
MEDIUM

CVE-2026-31670

Published: April 24, 2026· Updated: Apr 27, 2026

5.5
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:1.7th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-31670 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Linux1 product
linux kernel
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://git.kernel.org/stable/c/4bcd1615a4e2a185ae9edd27b4143d7dfa7134f4
PATCHhttps://git.kernel.org/stable/c/673d2a3eef6e0ee9736501a150c9e4024a4e60a6
PATCHhttps://git.kernel.org/stable/c/80ce4cb026f0a4c4532b6cad827b44debda6256a
PATCHhttps://git.kernel.org/stable/c/82843afc19012a29ba863961ef494165aa1a88f4
PATCHhttps://git.kernel.org/stable/c/a8c26800e0220e1550af012f5a20e50f5c78864d
PATCHhttps://git.kernel.org/stable/c/b1e0c8d3ab58a0161db487bf5fc47adfcaf5d5ca
PATCHhttps://git.kernel.org/stable/c/e3842779547c83150569071d9980517cc9029fc0
PATCHhttps://git.kernel.org/stable/c/ea245d78dec594372e27d8c79616baf49e98a4a1

All References (8)

→
https://git.kernel.org/stable/c/4bcd1615a4e2a185ae9edd27b4143d7dfa7134f4Patch
→
https://git.kernel.org/stable/c/673d2a3eef6e0ee9736501a150c9e4024a4e60a6Patch
→
https://git.kernel.org/stable/c/80ce4cb026f0a4c4532b6cad827b44debda6256aPatch
→
https://git.kernel.org/stable/c/82843afc19012a29ba863961ef494165aa1a88f4Patch
→
https://git.kernel.org/stable/c/a8c26800e0220e1550af012f5a20e50f5c78864dPatch
→
https://git.kernel.org/stable/c/b1e0c8d3ab58a0161db487bf5fc47adfcaf5d5caPatch
→
https://git.kernel.org/stable/c/e3842779547c83150569071d9980517cc9029fc0Patch
→
https://git.kernel.org/stable/c/ea245d78dec594372e27d8c79616baf49e98a4a1Patch

Quick Facts

CVE IDCVE-2026-31670
CVSS Score5.5 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedApr 24, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-31670 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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