Answer in brief
CVE-2026-98422 records a Unknown severity vulnerability in wifi: mac80211: reset the AP_VLAN tailroom counter on ifdown. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 <b0b32d3f163d24ea7134380666193bf398e9dc0b || >=f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 <f6b34a7d64324faf28eedc0f8678b0f832f1cc36 || >=f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 <304a874670a0b6ab5589a7f60b4af0251797b121 || >=f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 <7775759e3cb35ef5a571b2d877c2a9b70a5d5f08 || >=f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 <3d76b45e8432c0d75fcb9e90d92eaa3176898adf || >=f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 <4b54d01b48445b66c9e576de92b90a3a3ae7b34a || >=f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 <875835377d8d62c849b4eb03a7abfafa71d7668f || >=f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 <4504f3960dc4501c73be9f99eabda2e26e9db41e | b0b32d3f163d24ea7134380666193bf398e9dc0b, f6b34a7d64324faf28eedc0f8678b0f832f1cc36, 304a874670a0b6ab5589a7f60b4af0251797b121, 7775759e3cb35ef5a571b2d877c2a9b70a5d5f08, 3d76b45e8432c0d75fcb9e90d92eaa3176898adf, 4b54d01b48445b66c9e576de92b90a3a3ae7b34a, 875835377d8d62c849b4eb03a7abfafa71d7668f, 4504f3960dc4501c73be9f99eabda2e26e9db41e |
| Linux/Linuxgeneric | 4.1 | Not reported |
Published upstream
Oct 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 14, 2026
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.
Quoted source text, attributed separately from HOL analysis.