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CVE-2026-98423

Unknown

Last modified

CVE-2026-98423 is a vulnerability of currently unknown severity. 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..

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 7882513bacb176ab4aacceefdd035ca9479da4fb, < 5ce9b2bc9e73213e316a8c72400256a76bf41814; >= 7882513bacb176ab4aacceefdd035ca9479da4fb, < c4e4fe330294e3936e0f4e15d6996468f8a45fb2; >= 7882513bacb176ab4aacceefdd035ca9479da4fb, < 2f59be7585dc81baa6f36b0035dd6848ea43d318; >= 7882513bacb176ab4aacceefdd035ca9479da4fb, < 5c79ef616aa16af582fb2cb93b0f750975a0004f; >= 7882513bacb176ab4aacceefdd035ca9479da4fb, < d7fa45d8123a7f794b93fc22dbcf19f38dc4d8cb; >= 7882513bacb176ab4aacceefdd035ca9479da4fb, < 87840d4a3a21b1c19b867a80e16ba69dff284de2
LinuxLinux3.1

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98423?
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.
How severe is CVE-2026-98423?
Severity scoring for CVE-2026-98423 is pending analysis.
How do I fix CVE-2026-98423?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST