CVE-2026-90371

Kernel memory corruption via cross-NAPI page recycling

Published Sep 17, 2026 · Updated Sep 18, 2026

Race condition in Linux 6.18 through 7.2.5 allows physically proximate attackers to corrupt kernel memory via flooded Wi-Fi frames. The mt76 RXDMAD_C path directly returns pages to a pool owned by another NAPI, allowing concurrent lockless updates to reuse stale pages or overrun the allocation cache. Exploitation requires an active mt7996 or mt7992 HWRRO v3.1 interface and can disclose or overwrite kernel memory or panic the host.

CVSS severity8.8
High
EPSS probability0.38%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Linux 6.18 through 7.2.5 allows physically proximate attackers to corrupt kernel memory via flooded Wi-Fi frames. The mt76 RXDMAD_C path directly returns pages to a pool owned by another NAPI, allowing concurrent lockless updates to reuse stale pages or overrun the allocation cache. Exploitation requires an active mt7996 or mt7992 HWRRO v3.1 interface and can disclose or overwrite kernel memory or panic the host.

The record

CVE
CVE-2026-90371
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=6.18
  2. Affected versionversion=e50d4d710efd2dbc46965e9608bbb502bcfc5c99 <7ac05ed3a50e511c93f8506e555709a208dfce0a
  3. Affected versionversion=e50d4d710efd2dbc46965e9608bbb502bcfc5c99 <a273dc3b86a7d983d643827d3d3c795d55d8f632
  4. Affected versionversion=e50d4d710efd2dbc46965e9608bbb502bcfc5c99 <e1f97c10a4ec2b9db69a134b757304399ca903ce

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.18; version=e50d4d710efd2dbc46965e9608bbb502bcfc5c99 <7ac05ed3a50e511c93f8506e555709a208dfce0a; version=e50d4d710efd2dbc46965e9608bbb502bcfc5c99 <a273dc3b86a7d983d643827d3d3c795d55d8f632; version=e50d4d710efd2dbc46965e9608bbb502bcfc5c99 <e1f97c10a4ec2b9db69a134b757304399ca903ce

Published CVSS scores

8.8Linux CNACVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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