wifi: mac80211: validate extension-frame layout before RX
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: validate extension-frame layout before RX Extension frames only have the extension header at the regular 802.11 header offset. The generic RX path can still reach helpers and interface dispatch code that read regular header address fields before unsupported extension subtypes are dropped. mac80211 currently only handles S1G beacon extension frames. Drop other extension subtypes before they can reach regular-header RX processing. For S1G beacons, linearize the SKB with the management-frame path and require the fixed S1G beacon header, including optional fixed fields indicated by frame control, before generic RX dispatch. Route S1G beacons through the station/default-link RX path without regular-header station lookup. Avoid regular-header address reads in the mac80211 RX paths that process S1G extension beacons, including accept-frame, duplicate-detection, address-copy, and MLO address-translation paths. Also make ieee80211_get_bssid() length-safe before returning the S1G source-address pointer.
CVE-2026-68470
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-2026-68470
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": "09a740ce352e1a1d16b9984115514ba9a4f4704b",
"lessThan": "7aba69b611007e11b9b93118ff8fe88998c3107f",
"versionType": "git"
},
{
"status": "affected",
"version": "09a740ce352e1a1d16b9984115514ba9a4f4704b",
"lessThan": "1c3d9c6bd5b795f3b952b40d574c8e424e14a39b",
"versionType": "git"
},
{
"status": "affected",
"version": "09a740ce352e1a1d16b9984115514ba9a4f4704b",
"lessThan": "625fc704b19cb48d7d269ad54ffffb4d3bf9c7ed",
"versionType": "git"
},
{
"status": "affected",
"version": "09a740ce352e1a1d16b9984115514ba9a4f4704b",
"lessThan": "57d503ce32eccfa7650065ca4c560f7e29a2e676",
"versionType": "git"
}
],
"programFiles": [
"net/mac80211/rx.c",
"net/mac80211/util.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/mac80211/rx.c",
"net/mac80211/util.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68470
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46485 · Revision 1
- Added to Heist Feed
- Publisher date