wifi: cfg80211: only group hidden BSSes with beacon entries
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: only group hidden BSSes with beacon entries When a probe response for an unknown BSS comes in, __cfg80211_bss_update() looks for an existing entry with the same BSSID and a hidden (zero-length or NUL-filled) SSID, and if it finds one it groups them, using the beacon IEs from the existing entry. But that could find another entry without a beacon, if it was also from a probe response (with SSID), so there's a group without beacon elements. If a beacon with a hidden SSID for that BSSID arrives later, cfg80211_combine_bsses() goes looking for the probe response entries that belong to it - i.e. entries with the same BSSID and channel that have no beacon IEs - and finds those two. They are already grouped with each other, so it hits its WARN_ON_ONCE(bss->pub.hidden_beacon_bss) WARN_ON_ONCE(!list_empty(&bss->hidden_list)) which are there because an entry without beacon elements is not supposed to be part of a group yet. Only combine entries when a beacon was already received, ones that are kept separate will be combined when a beacon arrives.
CVE-2026-98340
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-2026-98340
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": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc",
"lessThan": "4cd6a518ce7527284bbc9baab5fa2453a7d477c2",
"versionType": "git"
},
{
"status": "affected",
"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc",
"lessThan": "74ed0d992f392c75e1969415527e06df3f7a4034",
"versionType": "git"
},
{
"status": "affected",
"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc",
"lessThan": "3658093df69849daf4f813a8f087f358e13be203",
"versionType": "git"
},
{
"status": "affected",
"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc",
"lessThan": "73365b81630b57e1a1f9d50dc87281797855c2ac",
"versionType": "git"
},
{
"status": "affected",
"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc",
"lessThan": "7405dd19bda4537a2843637d8d7bed1efd4776cf",
"versionType": "git"
},
{
"status": "affected",
"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc",
"lessThan": "86235be788094131912e9bd8412b358d91d99f49",
"versionType": "git"
},
{
"status": "affected",
"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc",
"lessThan": "332ea1502c46f53375cb109fa82bfaff818f3a41",
"versionType": "git"
},
{
"status": "affected",
"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc",
"lessThan": "068843ed0902c552a13860c5ec6b2ca65b57a065",
"versionType": "git"
}
],
"programFiles": [
"net/wireless/scan.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.9",
"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/wireless/scan.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98340
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38417 · Revision 1
- Added to Heist Feed
- Publisher date