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

CVE-2026-98823: wifi: cfg80211: preserve hidden-group beacon IE ownership

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: 0.19% (FIRST EPSS).
  • Fixed version: Linux Linux 00f83d39675adc12d56957a1f5e316812157e4d3, 3c44f780d1738e9ddf438729f5ff6ceb45f9ded3, 49b66110a08e4f926f6393e938f226de2750a08b; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 6.6.161.1-1.

Low priority for now. Upgrade to Linux Linux 00f83d39675adc12d56957a1f5e316812157e4d3, 3c44f780d1738e9ddf438729f5ff6ceb45f9ded3, 49b66110a08e4f926f6393e938f226de2750a08b; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 6.6.161.1-1 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: preserve hidden-group beacon IE ownership A hidden-group probe-response entry borrows its beacon IEs from the group's beacon entry. cfg80211_update_assoc_bss_entry() can pass such an entry to cfg80211_update_known_bss() when merging scan entries after a channel switch. Copying the borrowed beacon_ies into the associated entry gives the same allocation two owners. Releasing the group's beacon entry can then leave the associated entry pointing to freed IEs, which are freed again when that entry is released. Skip beacon IE replacement when the source entry belongs to a hidden group. Preserve probe-response processing, the subsequent metadata updates, and the existing rejection path for conflicting hidden beacon updates.

—No exploit Fix available
Published
Oct 18, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 8th 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%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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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

    • 5.4affected
    • 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and later · before 00f83d39675adc12d56957a1f5e316812157e4d3affected · git
    • 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and later · before 3c44f780d1738e9ddf438729f5ff6ceb45f9ded3affected · git
    • 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and later · before 8f79f429dc87a4f21e4fcf9a4d3df9484ca9a294affected · git
    • 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and later · before 5617d5328839003c91007ce906b4f100b43926e9affected · git
    • 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and later · before 49b66110a08e4f926f6393e938f226de2750a08baffected · git
    • 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and later · before dd7973a4130b0862be38d7e08cc0e874b3d99967affected · git
    • 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and later · before 5f27581c176f84b52ec0ab9be7b500c10667ef60affected · git
    • 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and later · before cc45f313d85533d647ce619326302aad6f797c14affected · git
    • before 5.4not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.10-17.2.10-1

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-2026-98821Oct 18, 2026 · block: reject polled dio with user integrity metadata
    0Monitor
  • ← EarlierCVE-2026-98822Oct 18, 2026 · wifi: mac80211: prevent AP VLAN tx from other interfaces
    0Monitor
  • Later →CVE-2026-98824Oct 18, 2026 · wifi: mac80211: validate TX status rate metadata
    0Monitor

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 Linux00f83d39675adc12d56957a1f5e316812157e4d3Vendor (CNA)
Linux Linux3c44f780d1738e9ddf438729f5ff6ceb45f9ded3Vendor (CNA)
Linux Linux49b66110a08e4f926f6393e938f226de2750a08bVendor (CNA)
Linux Linux5617d5328839003c91007ce906b4f100b43926e9Vendor (CNA)
Linux Linux5f27581c176f84b52ec0ab9be7b500c10667ef60Vendor (CNA)
Linux Linux8f79f429dc87a4f21e4fcf9a4d3df9484ca9a294Vendor (CNA)
Linux Linuxcc45f313d85533d647ce619326302aad6f797c14Vendor (CNA)
Linux Linuxdd7973a4130b0862be38d7e08cc0e874b3d99967Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.159.1-1 on Azure Linux 3.06.6.161.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.12.113-1 · Debian:13Package 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 9, 2026+22 d
EPSS, last 120 days

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

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

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.

Change log

  1. Exploit maturity— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

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

All records