CVE-2026-90354Hinoki check available

Device-reference leak via duplicate PCI initialization

Published Sep 17, 2026 · Updated Sep 17, 2026

Resource leakage in the mt7915 driver in Linux 5.18 allows attackers to retain device references via duplicate PCI initialization. The mt7915_pci_init_hif2() helper runs twice, incrementing hif_idx, writing RECOG_ID, and acquiring two device references while removal releases only one. The affected path requires non-WED dual-HIF hardware; no attacker-controlled input, crash, or hang is documented.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Resource leakage in the mt7915 driver in Linux 5.18 allows attackers to retain device references via duplicate PCI initialization. The mt7915_pci_init_hif2() helper runs twice, incrementing hif_idx, writing RECOG_ID, and acquiring two device references while removal releases only one. The affected path requires non-WED dual-HIF hardware; no attacker-controlled input, crash, or hang is documented.

The record

CVE
CVE-2026-90354
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772
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=5.18
  2. Affected versionversion=cacdd67812c6df824704ac078f1770188a485ff9 <249cbaa1873550689fab136b74982cbba74c4169
  3. Affected versionversion=cacdd67812c6df824704ac078f1770188a485ff9 <29fbc5256c2d8448f084ff179d2e5092ecd1fc54
  4. Affected versionversion=cacdd67812c6df824704ac078f1770188a485ff9 <3ae8ad277e2819a281b0e36b55633c8515c16ce7
  5. Affected versionversion=cacdd67812c6df824704ac078f1770188a485ff9 <927fe8c0eb8c10295bc0018c8faa4d91f8fe98c6
  6. Affected versionversion=cacdd67812c6df824704ac078f1770188a485ff9 <bd2e8f535ae35beb45a7fcc17ec9bbf8dc4db5fe
  7. Affected versionversion=cacdd67812c6df824704ac078f1770188a485ff9 <eac18fadc791928379b179e54636494b92f8cf86

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.18; version=cacdd67812c6df824704ac078f1770188a485ff9 <249cbaa1873550689fab136b74982cbba74c4169; version=cacdd67812c6df824704ac078f1770188a485ff9 <29fbc5256c2d8448f084ff179d2e5092ecd1fc54; version=cacdd67812c6df824704ac078f1770188a485ff9 <3ae8ad277e2819a281b0e36b55633c8515c16ce7; version=cacdd67812c6df824704ac078f1770188a485ff9 <927fe8c0eb8c10295bc0018c8faa4d91f8fe98c6; version=cacdd67812c6df824704ac078f1770188a485ff9 <bd2e8f535ae35beb45a7fcc17ec9bbf8dc4db5fe; version=cacdd67812c6df824704ac078f1770188a485ff9 <eac18fadc791928379b179e54636494b92f8cf86

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.5Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-772Missing Release of Resource after Effective Lifetime

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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