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NVD / CVE Program· CNA Linux

CVE-2026-74408: wifi: ath9k: fix OOB access from firmware tx status queue ID

Noroxi assessment

Priority: Monitor (action score 35/100)

  • 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: 0.41% (FIRST EPSS).
  • Someone on the same network segment can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 336d4c8cd9b1646060ee690c881d465dfc09c6c0, 46ca1451f61b598f45cb5259e066d305444d95fc, 5435fd3edcb11c7cc4002847c83e9a50b49284dc.

Low priority for now. Upgrade to Linux Linux 336d4c8cd9b1646060ee690c881d465dfc09c6c0, 46ca1451f61b598f45cb5259e066d305444d95fc, 5435fd3edcb11c7cc4002847c83e9a50b49284dc 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: ath9k: fix OOB access from firmware tx status queue ID ath_tx_edma_tasklet() accesses sc->tx.txq[ts.qid] where ts.qid is a 4-bit hardware field (0-15), but the txq array only has ATH9K_NUM_TX_QUEUES (10) entries. A qid >= 10 causes an OOB array access. Add a bounds check on ts.qid before using it as an array index.

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.4% · 35th percentile
CWE
—

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
8.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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-2026-74408

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

    • 3.1affected
    • fce041beb03f93c7a771f0b4b6c45bb71ef90901 and later · before fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54affected · git
    • fce041beb03f93c7a771f0b4b6c45bb71ef90901 and later · before 734db72d55ca578a344dfa33e30145032c074b25affected · git
    • fce041beb03f93c7a771f0b4b6c45bb71ef90901 and later · before f5931d06b45ed402572bfe5832fff15864ef5481affected · git
    • fce041beb03f93c7a771f0b4b6c45bb71ef90901 and later · before 46ca1451f61b598f45cb5259e066d305444d95fcaffected · git
    • fce041beb03f93c7a771f0b4b6c45bb71ef90901 and later · before a9e055ac62cb3fcea262d4b687ec73eed82b3379affected · git
    • fce041beb03f93c7a771f0b4b6c45bb71ef90901 and later · before 5435fd3edcb11c7cc4002847c83e9a50b49284dcaffected · git
    • fce041beb03f93c7a771f0b4b6c45bb71ef90901 and later · before 336d4c8cd9b1646060ee690c881d465dfc09c6c0affected · git
    • fce041beb03f93c7a771f0b4b6c45bb71ef90901 and later · before 7ce2f118a2389e8f0a64068c6fe7cc7d40639be0affected · git
    • before 3.1not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

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-2026-74406Aug 15, 2026 · vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().
    39Monitor
  • ← EarlierCVE-2026-74407Aug 15, 2026 · wifi: ath11k: cancel SSR work items during PCI shutdown
    35Monitor
  • Later →CVE-2026-74409Aug 15, 2026 · wifi: rtw89: add bounds check on firmware mac_id in link lookup
    35Monitor

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 Linux336d4c8cd9b1646060ee690c881d465dfc09c6c0Vendor (CNA)
Linux Linux46ca1451f61b598f45cb5259e066d305444d95fcVendor (CNA)
Linux Linux5435fd3edcb11c7cc4002847c83e9a50b49284dcVendor (CNA)
Linux Linux734db72d55ca578a344dfa33e30145032c074b25Vendor (CNA)
Linux Linux7ce2f118a2389e8f0a64068c6fe7cc7d40639be0Vendor (CNA)
Linux Linuxa9e055ac62cb3fcea262d4b687ec73eed82b3379Vendor (CNA)
Linux Linuxf5931d06b45ed402572bfe5832fff15864ef5481Vendor (CNA)
Linux Linuxfb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54Vendor (CNA)
debian:linux6.1.180-1 · 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.

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).

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Adjacent
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

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