CVE-2026-98423
Received
Received - Intake
mac80211_hwsim Race Condition in Linux Kernel
Vulnerability report for CVE-2026-98423, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-14
Last updated on: 2026-10-14
Assigner: kernel.org
Description
Description
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211_hwsim: don't hand frames to mac80211 while stopping
The code checks ->started for frames coming from wmediumd, but the
radio can be stopped after the check and before frame delivery,
causing mac80211 to hit the WARN_ON(!local->started).
Expand the mutex for this case and synchronise against it when the
radio is stopped to avoid being able to hit the warning with hwsim.
Drop the error print that would've complicated the error path, it
only triggers for allocation failures (already noisy) and malformed
frames anyway.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | 7882513bacb176ab4aacceefdd035ca9479da4fb |
| Linux | Linux | 7882513bacb176ab4aacceefdd035ca9479da4fb |
| Linux | Linux | 7882513bacb176ab4aacceefdd035ca9479da4fb |
| Linux | Linux | 7882513bacb176ab4aacceefdd035ca9479da4fb |
| Linux | Linux | 7882513bacb176ab4aacceefdd035ca9479da4fb |
| Linux | Linux | 7882513bacb176ab4aacceefdd035ca9479da4fb |
| Linux | Linux | 3.1 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
