VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

CVE-2026-98822: Linux kernel · wifi: mac80211: prevent AP VLAN tx from other interfaces

Source GCVE Database

Authoritative record:CVE-2026-98822

Not known to be exploited · fixed in fd875e24e8f2b202e3636b3ef8e6060874eca0e5 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in fd875e24e8f2b202e3636b3ef8e6060874eca0e5, ad61b9a5febb42e4b96df8d30ad76ddc36dda9d0, 88e96d902efeefbffc34450969f40dc61a0c8a42 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 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.

ghsa-qq49-42v2-78c9

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 97ffe75791b3e9c0797d5891070e41321c3beccb, < fd875e24e8f2b202e3636b3ef8e6060874eca0e5	Fixed in fd875e24e8f2b202e3636b3ef8e6060874eca0e5
LinuxLinux	Affected ≥ 97ffe75791b3e9c0797d5891070e41321c3beccb, < ad61b9a5febb42e4b96df8d30ad76ddc36dda9d0	Fixed in ad61b9a5febb42e4b96df8d30ad76ddc36dda9d0
LinuxLinux	Affected ≥ 97ffe75791b3e9c0797d5891070e41321c3beccb, < 88e96d902efeefbffc34450969f40dc61a0c8a42	Fixed in 88e96d902efeefbffc34450969f40dc61a0c8a42
LinuxLinux	Affected ≥ 97ffe75791b3e9c0797d5891070e41321c3beccb, < 7f93ca31f7fd9b42e7d692f59514436d448ac908	Fixed in 7f93ca31f7fd9b42e7d692f59514436d448ac908
LinuxLinux	Affected ≥ 97ffe75791b3e9c0797d5891070e41321c3beccb, < 2fe08c8ff26841430a3c98ab755337325b5d47b5	Fixed in 2fe08c8ff26841430a3c98ab755337325b5d47b5
LinuxLinux	Affected =4.1	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel to restrict station matching to the interface the frame is sent on, except for control port frames. Users should apply the official Linux kernel update that includes this fix to remediate the vulnerability. No additional mitigation steps are indicated.

Description

A vulnerability in the Linux kernel's mac80211 WiFi subsystem allowed unicast frames sent on one interface to be incorrectly matched and transmitted to stations of a different VLAN within the same BSS. This issue was caused by the station lookup function ieee80211_lookup_ra_sta() using a broader matching approach after refactoring, leading to cross-VLAN transmission of frames. The fix restricts matching to stations on the same interface except for control port frames, which may be sent for VLAN stations on the BSS interface.

References

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