CVE-2026-90349Hinoki check available

Memory access via unchecked primary link index

Published Sep 17, 2026 · Updated Sep 17, 2026

Out-of-bounds access in Linux 6.18 mt7996_tx() allows attackers to access memory beyond Wi-Fi link arrays via an unspecified link ID. When mac80211 omits the link, the function uses the primary link ID of 15 unchecked to index vif->link_conf[], mvif->mt76.link[], and sta->link[], each containing 15 entries. This requires the mt7996 transmit path before the first link is added; public sources do not establish attacker control or a specific crash outcome.

CVSS severity4.7
Medium
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Out-of-bounds access in Linux 6.18 mt7996_tx() allows attackers to access memory beyond Wi-Fi link arrays via an unspecified link ID. When mac80211 omits the link, the function uses the primary link ID of 15 unchecked to index vif->link_conf[], mvif->mt76.link[], and sta->link[], each containing 15 entries. This requires the mt7996 transmit path before the first link is added; public sources do not establish attacker control or a specific crash outcome.

The record

CVE
CVE-2026-90349
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1609b014aa29f9a2bf3aaa93f71de4a06725845e <4330a0ef9f75a54fde3548432a9a698f06bab635
  2. Affected versionversion=1609b014aa29f9a2bf3aaa93f71de4a06725845e <637bb99cc766a858d744905e46638459ca128b6c
  3. Affected versionversion=1609b014aa29f9a2bf3aaa93f71de4a06725845e <aff81505a84d27f83b4db8e039e813930cb23c2c
  4. Affected versionversion=6.18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1609b014aa29f9a2bf3aaa93f71de4a06725845e <4330a0ef9f75a54fde3548432a9a698f06bab635; version=1609b014aa29f9a2bf3aaa93f71de4a06725845e <637bb99cc766a858d744905e46638459ca128b6c; version=1609b014aa29f9a2bf3aaa93f71de4a06725845e <aff81505a84d27f83b4db8e039e813930cb23c2c; version=6.18

Published CVSS scores

4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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