CVE-2026-90382Hinoki check available

Kernel panic via invalid receive-length warning

Published Sep 17, 2026 · Updated Sep 17, 2026

DoS in the Linux mt76x02 driver allows physically proximate attackers to crash the kernel via corrupted wireless frames. The receive-length bounds check rejects oversized frames but invokes WARN_ON_ONCE, tainting the kernel rather than silently discarding invalid input. Exposure requires compatible wireless hardware in monitor mode with fcsfail enabled; panic_on_warn turns the first warning into a kernel panic, while the bounds check still prevents an oversized-buffer access.

CVSS severity5.3
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

DoS in the Linux mt76x02 driver allows physically proximate attackers to crash the kernel via corrupted wireless frames. The receive-length bounds check rejects oversized frames but invokes WARN_ON_ONCE, tainting the kernel rather than silently discarding invalid input. Exposure requires compatible wireless hardware in monitor mode with fcsfail enabled; panic_on_warn turns the first warning into a kernel panic, while the bounds check still prevents an oversized-buffer access.

The record

CVE
CVE-2026-90382
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
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=4.16
  2. Affected versionversion=7bc04215a66b60e198aecaee8418f6d79fa19faa <17d6b89e09eac2d90272fceeba3644e92212e02f
  3. Affected versionversion=7bc04215a66b60e198aecaee8418f6d79fa19faa <2d31e332c13b1db7745a7bd9cf74bc105524bcac
  4. Affected versionversion=7bc04215a66b60e198aecaee8418f6d79fa19faa <61b1f6d92249bc34580ff19de7c69c805f82adca
  5. Affected versionversion=7bc04215a66b60e198aecaee8418f6d79fa19faa <6def491fe9c4e83aa8cba62d74e9d4ab751ee967
  6. Affected versionversion=7bc04215a66b60e198aecaee8418f6d79fa19faa <81497634d9f872fd3e8b03aada55574afff6f174
  7. Affected versionversion=7bc04215a66b60e198aecaee8418f6d79fa19faa <b6e7958602bd1acdb8ae92703b6689a28bcc9bc0
  8. Affected versionversion=7bc04215a66b60e198aecaee8418f6d79fa19faa <c65bbfc730df9ebf0fea8e286b0ad2dfab03dbfe
  9. Affected versionversion=7bc04215a66b60e198aecaee8418f6d79fa19faa <d55e7aede542c4c76ead82d37d0c112f21eb2ac2

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.16; version=7bc04215a66b60e198aecaee8418f6d79fa19faa <17d6b89e09eac2d90272fceeba3644e92212e02f; version=7bc04215a66b60e198aecaee8418f6d79fa19faa <2d31e332c13b1db7745a7bd9cf74bc105524bcac; version=7bc04215a66b60e198aecaee8418f6d79fa19faa <61b1f6d92249bc34580ff19de7c69c805f82adca; version=7bc04215a66b60e198aecaee8418f6d79fa19faa <6def491fe9c4e83aa8cba62d74e9d4ab751ee967; version=7bc04215a66b60e198aecaee8418f6d79fa19faa <81497634d9f872fd3e8b03aada55574afff6f174; version=7bc04215a66b60e198aecaee8418f6d79fa19faa <b6e7958602bd1acdb8ae92703b6689a28bcc9bc0; version=7bc04215a66b60e198aecaee8418f6d79fa19faa <c65bbfc730df9ebf0fea8e286b0ad2dfab03dbfe; version=7bc04215a66b60e198aecaee8418f6d79fa19faa <d55e7aede542c4c76ead82d37d0c112f21eb2ac2

Published CVSS scores

4.3Amazon LinuxCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
5.3SUSECVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
4.3SUSECVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

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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

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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