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

CVE-2026-98891: wifi: mac80211: validate deauth frame length before reason access

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 4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60f, 51092dc769f021e9634474e1bd5a561da477fbdb, 7a5ef1fd654d0e90d59aa32c881789c8bcc4125a; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.159.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60f, 51092dc769f021e9634474e1bd5a561da477fbdb, 7a5ef1fd654d0e90d59aa32c881789c8bcc4125a; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.159.1-1 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: mac80211: validate deauth frame length before reason access ieee80211_rx_mgmt_deauth() reads the deauth reason code before checking that the fixed field is actually present in the received frame. Validate the deauth frame length first and only then read the reason code.

—No exploit Fix available
Published
Oct 23, 2026
Updated
Oct 26, 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%

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

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • 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

    • 4.2affected
    • c9c99f8938e41b878802d5d8481d6f7a212515b0 and later · before 51092dc769f021e9634474e1bd5a561da477fbdbaffected · git
    • c9c99f8938e41b878802d5d8481d6f7a212515b0 and later · before a6ed4c00ccdc15011a73daa2b38af9fc5a2c543eaffected · git
    • c9c99f8938e41b878802d5d8481d6f7a212515b0 and later · before 80d1a110e9096b5bf41497f6b151154084862385affected · git
    • c9c99f8938e41b878802d5d8481d6f7a212515b0 and later · before a78689e2beed200d4590318612c74ae25c9408cfaffected · git
    • c9c99f8938e41b878802d5d8481d6f7a212515b0 and later · before 7a5ef1fd654d0e90d59aa32c881789c8bcc4125aaffected · git
    • c9c99f8938e41b878802d5d8481d6f7a212515b0 and later · before 9df64ad43e1f2c036667bba2bf385e9d7b3af564affected · git
    • c9c99f8938e41b878802d5d8481d6f7a212515b0 and later · before 4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60faffected · git
    • before 4.2not affected · semver
    • 5.10.271 and later · up to and including 5.10.*not 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:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

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-2026-98889Oct 23, 2026 · wifi: iwlwifi: mvm: fix sched scan IE sizing
    31Monitor
  • ← EarlierCVE-2026-98890Oct 23, 2026 · wifi: libertas: reject short monitor TX frames
    0Monitor
  • Later →CVE-2026-98892Oct 23, 2026 · firmware: arm_scmi: Validate BASE_ERROR_EVENT payload size
    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 Linux4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60fVendor (CNA)
Linux Linux51092dc769f021e9634474e1bd5a561da477fbdbVendor (CNA)
Linux Linux7a5ef1fd654d0e90d59aa32c881789c8bcc4125aVendor (CNA)
Linux Linux80d1a110e9096b5bf41497f6b151154084862385Vendor (CNA)
Linux Linux9df64ad43e1f2c036667bba2bf385e9d7b3af564Vendor (CNA)
Linux Linuxa6ed4c00ccdc15011a73daa2b38af9fc5a2c543eVendor (CNA)
Linux Linuxa78689e2beed200d4590318612c74ae25c9408cfVendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.159.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · 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 7, 2026+15 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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 (6 more)

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

All records