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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98340: wifi: cfg80211: only group hidden BSSes with beacon entries

—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 068843ed0902c552a13860c5ec6b2ca65b57a065, 332ea1502c46f53375cb109fa82bfaff818f3a41, 3658093df69849daf4f813a8f087f358e13be203; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.

Low priority for now. Upgrade to Linux Linux 068843ed0902c552a13860c5ec6b2ca65b57a065, 332ea1502c46f53375cb109fa82bfaff818f3a41, 3658093df69849daf4f813a8f087f358e13be203; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Oct 6, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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Noroxi analysis

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.9affected
    • 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc and later · before 4cd6a518ce7527284bbc9baab5fa2453a7d477c2affected · git
    • 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc and later · before 74ed0d992f392c75e1969415527e06df3f7a4034affected · git
    • 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc and later · before 3658093df69849daf4f813a8f087f358e13be203affected · git
    • 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc and later · before 73365b81630b57e1a1f9d50dc87281797855c2acaffected · git
    • 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc and later · before 7405dd19bda4537a2843637d8d7bed1efd4776cfaffected · git
    • 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc and later · before 86235be788094131912e9bd8412b358d91d99f49affected · git
    • 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc and later · before 332ea1502c46f53375cb109fa82bfaff818f3a41affected · git
    • 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc and later · before 068843ed0902c552a13860c5ec6b2ca65b57a065affected · git
    • before 3.9not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.8-17.2.8-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-98338Oct 6, 2026 · wifi: cfg80211: ibss: ref BSS entry for joined event
    0Monitor
  • ← EarlierCVE-2026-98339Oct 6, 2026 · wifi: cfg80211: don't filter by BSS type when removing stale entries
    35Monitor
  • Later →CVE-2026-98341Oct 6, 2026 · wifi: cfg80211: don't free driver-owned scan requests
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux068843ed0902c552a13860c5ec6b2ca65b57a065Vendor (CNA)
Linux Linux332ea1502c46f53375cb109fa82bfaff818f3a41Vendor (CNA)
Linux Linux3658093df69849daf4f813a8f087f358e13be203Vendor (CNA)
Linux Linux4cd6a518ce7527284bbc9baab5fa2453a7d477c2Vendor (CNA)
Linux Linux73365b81630b57e1a1f9d50dc87281797855c2acVendor (CNA)
Linux Linux7405dd19bda4537a2843637d8d7bed1efd4776cfVendor (CNA)
Linux Linux74ed0d992f392c75e1969415527e06df3f7a4034Vendor (CNA)
Linux Linux86235be788094131912e9bd8412b358d91d99f49Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.158.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux7.2.8-1 · Debian:14Package registry (OSV)
debian:linux-6.126.12.113-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 13, 2026+38 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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