CVE-2026-98423wifi: mac80211_hwsim: don't hand frames to mac80211 while stopping
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Linux Linux linux:linux (from the name) | 7882513bacb176ab4aacceefdd035ca9479da4fb builds before 5ce9b2bc9e73213e316a8c72400256a76bf41814; from 7882513bacb176ab4aacceefdd035ca9479da4fb before c4e4fe330294e3936e0f4e15d6996468f8a45fb2; 7882513bacb176ab4aacceefdd035ca9479da4fb builds before 2f59be7585dc81baa6f36b0035dd6848ea43d318; 7882513bacb176ab4aacceefdd035ca9479da4fb builds before 5c79ef616aa16af582fb2cb93b0f750975a0004f; from 7882513bacb176ab4aacceefdd035ca9479da4fb before d7fa45d8123a7f794b93fc22dbcf19f38dc4d8cb; 7882513bacb176ab4aacceefdd035ca9479da4fb builds before 87840d4a3a21b1c19b867a80e16ba69dff284de2 | CNA record |
References
- https://git.kernel.org/stable/c/5ce9b2bc9e73213e316a8c72400256a76bf41814
- https://git.kernel.org/stable/c/c4e4fe330294e3936e0f4e15d6996468f8a45fb2
- https://git.kernel.org/stable/c/2f59be7585dc81baa6f36b0035dd6848ea43d318
- https://git.kernel.org/stable/c/5c79ef616aa16af582fb2cb93b0f750975a0004f
- https://git.kernel.org/stable/c/d7fa45d8123a7f794b93fc22dbcf19f38dc4d8cb
- https://git.kernel.org/stable/c/87840d4a3a21b1c19b867a80e16ba69dff284de2
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.