CVE-2026-31670: Linux kernel · net: rfkill: prevent unlimited numbers of rfkill events from being created
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in ea245d78dec594372e27d8c79616baf49e98a4a1 : update Linux kernel when convenient.
Data as of 6 Nov 2026, 16:04 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in ea245d78dec594372e27d8c79616baf49e98a4a1, e3842779547c83150569071d9980517cc9029fc0, b1e0c8d3ab58a0161db487bf5fc47adfcaf5d5ca +5
Exploitation evidence
Disclosed: evidence found.
CVE published 24 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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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.
References
- git.kernel.org/stable/c/4bcd1615a4e2a185ae9edd27b4143d7dfa7134f4 (opens in a new tab)
- git.kernel.org/stable/c/b1e0c8d3ab58a0161db487bf5fc47adfcaf5d5ca (opens in a new tab)
- git.kernel.org/stable/c/e3842779547c83150569071d9980517cc9029fc0 (opens in a new tab)
- git.kernel.org/stable/c/673d2a3eef6e0ee9736501a150c9e4024a4e60a6 (opens in a new tab)
- git.kernel.org/stable/c/82843afc19012a29ba863961ef494165aa1a88f4 (opens in a new tab)
- git.kernel.org/stable/c/a8c26800e0220e1550af012f5a20e50f5c78864d (opens in a new tab)
- git.kernel.org/stable/c/80ce4cb026f0a4c4532b6cad827b44debda6256a (opens in a new tab)
- git.kernel.org/stable/c/ea245d78dec594372e27d8c79616baf49e98a4a1 (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-082556.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)