CVE-2026-93090Hinoki check available

Resource leakage via skipped channel cleanup

Published Sep 17, 2026 · Updated Sep 17, 2026

Resource leakage in Linux 6.3 ARM SCMI allows attackers to leave transport resources allocated via channel-setup failures. In drivers/firmware/arm_scmi/driver.c, scmi_probe skips channel cleanup after scmi_channels_setup() fails, retaining transport channels, devices, and TX/RX IDR state before freeing the instance ID. The path requires partial channel setup followed by failure; public evidence does not establish an attacker-controlled trigger or a specific crash, hang, or privilege gain.

CVSS severity1.9
Low
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Resource leakage in Linux 6.3 ARM SCMI allows attackers to leave transport resources allocated via channel-setup failures. In drivers/firmware/arm_scmi/driver.c, scmi_probe skips channel cleanup after scmi_channels_setup() fails, retaining transport channels, devices, and TX/RX IDR state before freeing the instance ID. The path requires partial channel setup followed by failure; public evidence does not establish an attacker-controlled trigger or a specific crash, hang, or privilege gain.

The record

CVE
CVE-2026-93090
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
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=05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 <43aad7687238d6178cb3fdac53c8de3f43bfa028
  2. Affected versionversion=05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 <687d67be3d87894ef12e8a164434612e0b53cfae
  3. Affected versionversion=05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 <b8479e1f0219cf18bfdfeca97994e563a0afb602
  4. Affected versionversion=05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 <d33b2b68bce6d5e28ee77f0952d7f3dc82bbe610
  5. Affected versionversion=6.3

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 <43aad7687238d6178cb3fdac53c8de3f43bfa028; version=05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 <687d67be3d87894ef12e8a164434612e0b53cfae; version=05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 <b8479e1f0219cf18bfdfeca97994e563a0afb602; version=05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 <d33b2b68bce6d5e28ee77f0952d7f3dc82bbe610; version=6.3

Published CVSS scores

1.9Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/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.

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)
VectorUnavailable
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.

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Technologies

Your stack

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Your stack

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