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NVD / CVE Program· CNA Linux

CVE-2026-68406: wifi: cfg80211: validate PMSR FTM preamble range

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: 0.18% (FIRST EPSS).
  • Fixed version: Linux Linux 2b97fa1bce7731f6a244f3d4407c61858f09b93f, 36230936468f0ba4930e94aef496fc229d4bb951, 44ea65d779e2d23b2264fea6af2d0c666a3ec9fb; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 2b97fa1bce7731f6a244f3d4407c61858f09b93f, 36230936468f0ba4930e94aef496fc229d4bb951, 44ea65d779e2d23b2264fea6af2d0c666a3ec9fb; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1 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: validate PMSR FTM preamble range PMSR FTM request parsing accepts preamble values outside the enumerated nl80211 preamble range. Reject out-of-range values before using them in the parser capability bit test using the policy. [drop unnecessary check]

—No exploit Fix available
Published
Aug 10, 2026
Updated
Nov 6, 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%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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.

Follow CVE-2026-68406

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

    • 5.0affected
    • 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 and later · before 73ada9f23c2c7fac74474ea2a38ceb265bae17f1affected · git
    • 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 and later · before 2b97fa1bce7731f6a244f3d4407c61858f09b93faffected · git
    • 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 and later · before 9b33f260db3971f572dda0b45dd28d477cf51ed1affected · git
    • 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 and later · before 44ea65d779e2d23b2264fea6af2d0c666a3ec9fbaffected · git
    • 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 and later · before 922d71fbaf99c1d5318151a0cb0a42ad448d07d9affected · git
    • 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 and later · before cfbda103aeae61071a122a6fc2bfe98cffbd7165affected · git
    • 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 and later · before 58320cb47df2accc7a20bb72c0150280732fa58faffected · git
    • 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 and later · before 36230936468f0ba4930e94aef496fc229d4bb951affected · git
    • before 5.0not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.101-1~deb12u16.12.101-1~deb12u1
Debian:13linuxbefore 6.12.101-16.12.101-1
Debian:14linuxbefore 7.1.6-17.1.6-1

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-2026-68404Aug 10, 2026 · wifi: cfg80211: use wiphy work for socket owner autodisconnect
    31Monitor
  • ← EarlierCVE-2026-68405Aug 10, 2026 · wifi: mac80211: free AP_VLAN bc_buf SKBs outside IRQ lock
    0Monitor
  • Later →CVE-2026-68408Aug 10, 2026 · wifi: cfg80211: convert pmsr_free_wk to wiphy_work to fix deadlock
    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 Linux2b97fa1bce7731f6a244f3d4407c61858f09b93fVendor (CNA)
Linux Linux36230936468f0ba4930e94aef496fc229d4bb951Vendor (CNA)
Linux Linux44ea65d779e2d23b2264fea6af2d0c666a3ec9fbVendor (CNA)
Linux Linux58320cb47df2accc7a20bb72c0150280732fa58fVendor (CNA)
Linux Linux73ada9f23c2c7fac74474ea2a38ceb265bae17f1Vendor (CNA)
Linux Linux922d71fbaf99c1d5318151a0cb0a42ad448d07d9Vendor (CNA)
Linux Linux9b33f260db3971f572dda0b45dd28d477cf51ed1Vendor (CNA)
Linux Linuxcfbda103aeae61071a122a6fc2bfe98cffbd7165Vendor (CNA)
azl3 kernel 6.6.143.1-1 on Azure Linux 3.06.6.150.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~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.

No dated events beyond publication.

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. SSVC exploitation— → 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