VulnerabilityPublished 24 Sep 2026Updated 21 Oct 2026

CVE-2026-93804: Linux kernel · wifi: mac80211: ibss: wait for in-flight TX on disconnect

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in d0e69d9afa59b93c30294eba89b1f15f69e91105 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in d0e69d9afa59b93c30294eba89b1f15f69e91105, b3451e6971248250312ad32dd7f63cc9f0a925f5, 20a3fb5e1a95caa34896853ca17a50d21c754969 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to d0e69d9afa59b93c30294eba89b1f15f69e91105, b3451e6971248250312ad32dd7f63cc9f0a925f5, 20a3fb5e1a95caa34896853ca17a50d21c754969 or 8e4a07ed82bae5d13525770880dc6dfd27f9bccd.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 86a2ea4134b48f6371103cfceb521bf2d2bf76cd, < d0e69d9afa59b93c30294eba89b1f15f69e91105	Fixed in d0e69d9afa59b93c30294eba89b1f15f69e91105
LinuxLinux	Affected ≥ 86a2ea4134b48f6371103cfceb521bf2d2bf76cd, < b3451e6971248250312ad32dd7f63cc9f0a925f5	Fixed in b3451e6971248250312ad32dd7f63cc9f0a925f5
LinuxLinux	Affected ≥ 86a2ea4134b48f6371103cfceb521bf2d2bf76cd, < 20a3fb5e1a95caa34896853ca17a50d21c754969	Fixed in 20a3fb5e1a95caa34896853ca17a50d21c754969
LinuxLinux	Affected ≥ 86a2ea4134b48f6371103cfceb521bf2d2bf76cd, < 8e4a07ed82bae5d13525770880dc6dfd27f9bccd	Fixed in 8e4a07ed82bae5d13525770880dc6dfd27f9bccd
LinuxLinux	Affected =3.3	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: ibss: wait for in-flight TX on disconnect While leaving an IBSS in ieee80211_ibss_disconnect() mac80211 flushes stations, turns the carrier off and immediately tells the driver to leave as well. While there may be synchronize_net() in station flush and in this code later, packets can still be transmitted due to cross-CPU race conditions after carrier off is set. Therefore, it's possible for a race to happen where a TX to the driver occurs while or after telling it to leave the IBSS. This can be confusing to drivers, and in the case of iwlwifi leads to an attempt to use invalid queues. Move netif_carrier_off() to occur before sta_info_flush() during IBSS disconnect, and add synchronize_net() if flushing didn't, so that the synchronize_net() always happens between turning the carrier off and telling the driver, avoiding this race.

References

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