Not yet scoredPublished Oct 14, 2026

CVE-2026-98422wifi: mac80211: reset the AP_VLAN tailroom counter on ifdown

Updated under an hour ago (Oct 27, 2026, 12:40 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: reset the AP_VLAN tailroom counter on ifdown On ifup, AP_VLAN interfaces get crypto_tx_tailroom_needed_cnt from the AP interface, but it's never decremented again unless the AP is also brought down. Thus, bringing the same AP_VLAN up again will increment the counter again and eventually hit the sanity check: WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt != master->crypto_tx_tailroom_needed_cnt); Reset it on ifdown to avoid that.

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 19, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 before b0b32d3f163d24ea7134380666193bf398e9dc0b; from f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 before f6b34a7d64324faf28eedc0f8678b0f832f1cc36; from f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 before 304a874670a0b6ab5589a7f60b4af0251797b121; from f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 before 7775759e3cb35ef5a571b2d877c2a9b70a5d5f08; from f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 before 3d76b45e8432c0d75fcb9e90d92eaa3176898adf; from f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 before 4b54d01b48445b66c9e576de92b90a3a3ae7b34a; from f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 before 875835377d8d62c849b4eb03a7abfafa71d7668f; from f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 before 4504f3960dc4501c73be9f99eabda2e26e9db41e	CNA record

References

References

https://git.kernel.org/stable/c/b0b32d3f163d24ea7134380666193bf398e9dc0b
https://git.kernel.org/stable/c/f6b34a7d64324faf28eedc0f8678b0f832f1cc36
https://git.kernel.org/stable/c/304a874670a0b6ab5589a7f60b4af0251797b121
https://git.kernel.org/stable/c/7775759e3cb35ef5a571b2d877c2a9b70a5d5f08
https://git.kernel.org/stable/c/3d76b45e8432c0d75fcb9e90d92eaa3176898adf
https://git.kernel.org/stable/c/4b54d01b48445b66c9e576de92b90a3a3ae7b34a
https://git.kernel.org/stable/c/875835377d8d62c849b4eb03a7abfafa71d7668f
https://git.kernel.org/stable/c/4504f3960dc4501c73be9f99eabda2e26e9db41e

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.