CVE-2026-90287

Resource leakage via incorrect PHY initialization cleanup

Published Sep 17, 2026 · Updated Sep 17, 2026

Resource leakage in Linux 6.1 Sunplus USB2 PHY initialization allows attackers to retain clock and reset state via failed setup. The sp_uphy_init() error paths perform cleanup for unsuccessful stages and skip clock disabling and reset assertion when update_disc_vol() fails. Exposure requires the Sunplus SP7021 driver and an initialization failure; attacker control of that failure and any resulting crash or hang are not documented.

CVSS severity2.5
Low
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leakage in Linux 6.1 Sunplus USB2 PHY initialization allows attackers to retain clock and reset state via failed setup. The sp_uphy_init() error paths perform cleanup for unsuccessful stages and skip clock disabling and reset assertion when update_disc_vol() fails. Exposure requires the Sunplus SP7021 driver and an initialization failure; attacker control of that failure and any resulting crash or hang are not documented.

The record

CVE
CVE-2026-90287
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=6.1
  2. Affected versionversion=99d9ccd97385208b78b3d88e756451f4b70119fc <1489b694b1f3265cd5363100642a22190033f4b0
  3. Affected versionversion=99d9ccd97385208b78b3d88e756451f4b70119fc <1fce81a40e3b3ec6b4f52e278d5c2bde79b25939
  4. Affected versionversion=99d9ccd97385208b78b3d88e756451f4b70119fc <3a7dcbe3112aef3505beae4f982331a00326217c
  5. Affected versionversion=99d9ccd97385208b78b3d88e756451f4b70119fc <5acdc4d5b58bd0730824938db79b5f08ef996d9c
  6. Affected versionversion=99d9ccd97385208b78b3d88e756451f4b70119fc <8b2683bc4cc18c581b7cd24f227cbe61abca7f4d
  7. Affected versionversion=99d9ccd97385208b78b3d88e756451f4b70119fc <d8856bfe6d00c21c4c0ba689cb6c9e30ceaccb8f

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=6.1; version=99d9ccd97385208b78b3d88e756451f4b70119fc <1489b694b1f3265cd5363100642a22190033f4b0; version=99d9ccd97385208b78b3d88e756451f4b70119fc <1fce81a40e3b3ec6b4f52e278d5c2bde79b25939; version=99d9ccd97385208b78b3d88e756451f4b70119fc <3a7dcbe3112aef3505beae4f982331a00326217c; version=99d9ccd97385208b78b3d88e756451f4b70119fc <5acdc4d5b58bd0730824938db79b5f08ef996d9c; version=99d9ccd97385208b78b3d88e756451f4b70119fc <8b2683bc4cc18c581b7cd24f227cbe61abca7f4d; version=99d9ccd97385208b78b3d88e756451f4b70119fc <d8856bfe6d00c21c4c0ba689cb6c9e30ceaccb8f

Published CVSS scores

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.

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.

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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