CVE-2026-90368

Use-after-free via incomplete interface-add error cleanup

Published Sep 17, 2026 · Updated Sep 17, 2026

Linux 5.19's mt7915 Wi-Fi driver allows local users to trigger use-after-free when interface creation fails to allocate a WCID. On allocation failure, mt7915_add_interface() leaves interface masks and firmware device state allocated and retains monitor_vif after mac80211 frees the interface. The stale-pointer path requires the affected driver, failed allocation, and subsequent testmode access; the disclosure establishes resource leakage and freed-memory dereferencing, not arbitrary code execution.

CVSS severity3.9
Low
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Linux 5.19's mt7915 Wi-Fi driver allows local users to trigger use-after-free when interface creation fails to allocate a WCID. On allocation failure, mt7915_add_interface() leaves interface masks and firmware device state allocated and retains monitor_vif after mac80211 frees the interface. The stale-pointer path requires the affected driver, failed allocation, and subsequent testmode access; the disclosure establishes resource leakage and freed-memory dereferencing, not arbitrary code execution.

The record

CVE
CVE-2026-90368
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

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=5.19
  2. Affected versionversion=b619e01380eedf24e8d26a367e94e0ccaeb0c3dd <218fdf0fcb796b8d281dbdd4a6144c5a8fc7fd0f
  3. Affected versionversion=b619e01380eedf24e8d26a367e94e0ccaeb0c3dd <2fb6480c52f611338e1b0abe5e6219be1fc9ab75
  4. Affected versionversion=b619e01380eedf24e8d26a367e94e0ccaeb0c3dd <507eddb8175a67df5086354b92d6a4fd7f6f1f96
  5. Affected versionversion=b619e01380eedf24e8d26a367e94e0ccaeb0c3dd <71bf9de2ab3fb2c54bedb0b4c9b468d2e1d55280

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=b619e01380eedf24e8d26a367e94e0ccaeb0c3dd <218fdf0fcb796b8d281dbdd4a6144c5a8fc7fd0f; version=b619e01380eedf24e8d26a367e94e0ccaeb0c3dd <2fb6480c52f611338e1b0abe5e6219be1fc9ab75; version=b619e01380eedf24e8d26a367e94e0ccaeb0c3dd <507eddb8175a67df5086354b92d6a4fd7f6f1f96; version=b619e01380eedf24e8d26a367e94e0ccaeb0c3dd <71bf9de2ab3fb2c54bedb0b4c9b468d2e1d55280

Published CVSS scores

6.6TenableAV:L/AC:L/Au:N/C:N/I:C/A:C
3.9Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L
5.5TenableCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5TenableCVSS:3.1/AV:L/AC:L/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
PrivilegesUnavailable
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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