wifi: mac80211: reset the AP_VLAN tailroom counter on ifdown
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.
CVE-2026-98422
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98422
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
"lessThan": "b0b32d3f163d24ea7134380666193bf398e9dc0b",
"versionType": "git"
},
{
"status": "affected",
"version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
"lessThan": "f6b34a7d64324faf28eedc0f8678b0f832f1cc36",
"versionType": "git"
},
{
"status": "affected",
"version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
"lessThan": "304a874670a0b6ab5589a7f60b4af0251797b121",
"versionType": "git"
},
{
"status": "affected",
"version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
"lessThan": "7775759e3cb35ef5a571b2d877c2a9b70a5d5f08",
"versionType": "git"
},
{
"status": "affected",
"version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
"lessThan": "3d76b45e8432c0d75fcb9e90d92eaa3176898adf",
"versionType": "git"
},
{
"status": "affected",
"version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
"lessThan": "4b54d01b48445b66c9e576de92b90a3a3ae7b34a",
"versionType": "git"
},
{
"status": "affected",
"version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
"lessThan": "875835377d8d62c849b4eb03a7abfafa71d7668f",
"versionType": "git"
},
{
"status": "affected",
"version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
"lessThan": "4504f3960dc4501c73be9f99eabda2e26e9db41e",
"versionType": "git"
}
],
"programFiles": [
"net/mac80211/iface.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/mac80211/iface.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98422
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38486 · Revision 1
- Added to Heist Feed
- Publisher date