CVE-2026-90374Hinoki check available

Crash via unchecked RX band index

Published Sep 17, 2026 · Updated Sep 17, 2026

Unchecked RX indexing in Linux 6.2 mt7996 allows attackers to crash the kernel via invalid wireless receive descriptors. The driver uses the two-bit band_idx directly to index and dereference the three-entry dev->mt76.phys array, allowing out-of-bounds access or a NULL dereference on devices with fewer bands. An active mt7996 device must process an invalid descriptor; public sources do not establish how attackers control this hardware-provided field.

CVSS severity6.0
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

Unchecked RX indexing in Linux 6.2 mt7996 allows attackers to crash the kernel via invalid wireless receive descriptors. The driver uses the two-bit band_idx directly to index and dereference the three-entry dev->mt76.phys array, allowing out-of-bounds access or a NULL dereference on devices with fewer bands. An active mt7996 device must process an invalid descriptor; public sources do not establish how attackers control this hardware-provided field.

The record

CVE
CVE-2026-90374
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
adjacent
Privileges
unauthenticated

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=6.2
  2. Affected versionversion=98686cd21624c75a043e96812beadddf4f6f48e5 <0f53ece876e1f3bbb3e18f48afc4af1ee967b16c
  3. Affected versionversion=98686cd21624c75a043e96812beadddf4f6f48e5 <2243778a5fae8329ab5f18e7adcd7e03b911a1b7
  4. Affected versionversion=98686cd21624c75a043e96812beadddf4f6f48e5 <535091c587268cc783608642838a655d828eefdd
  5. Affected versionversion=98686cd21624c75a043e96812beadddf4f6f48e5 <b1c5cf8903bec5476a2233b4e45287b9a2213e02

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.2; version=98686cd21624c75a043e96812beadddf4f6f48e5 <0f53ece876e1f3bbb3e18f48afc4af1ee967b16c; version=98686cd21624c75a043e96812beadddf4f6f48e5 <2243778a5fae8329ab5f18e7adcd7e03b911a1b7; version=98686cd21624c75a043e96812beadddf4f6f48e5 <535091c587268cc783608642838a655d828eefdd; version=98686cd21624c75a043e96812beadddf4f6f48e5 <b1c5cf8903bec5476a2233b4e45287b9a2213e02

Published CVSS scores

6.0SUSECVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.3Amazon LinuxCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
5.3SUSECVSS:3.1/AV:A/AC:H/PR:N/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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