CVE-2026-46228

Memory exhaustion via interface-scoped resource leak

Published May 28, 2026 · Updated May 28, 2026

Memory leakage in the CH341 SPI driver in affected Linux Kernel releases allows local users to deplete memory through driver unbinds. The ch341_probe function attaches the SPI controller and its receive and transmit buffers to the parent USB device, so interface unbinding does not release those device-managed resources. The flaw requires local access and an affected driver unbind without physical USB disconnection, with availability as the only reported security impact.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leakage in the CH341 SPI driver in affected Linux Kernel releases allows local users to deplete memory through driver unbinds. The ch341_probe function attaches the SPI controller and its receive and transmit buffers to the parent USB device, so interface unbinding does not release those device-managed resources. The flaw requires local access and an affected driver unbind without physical USB disconnection, with availability as the only reported security impact.

The record

CVE
CVE-2026-46228
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 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=6.11
  2. Affected versionversion=8846739f52afa07e63395c80227dc544f54bd7b1 <108a64b27a52f781c4f3751641e3dd65c7dd2fb5
  3. Affected versionversion=8846739f52afa07e63395c80227dc544f54bd7b1 <4422fc2411cbbdf5104a914e0596bb483faea254
  4. Affected versionversion=8846739f52afa07e63395c80227dc544f54bd7b1 <abe572f630bc1f0e77041012ab075869036ede4f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.11; version=8846739f52afa07e63395c80227dc544f54bd7b1 <108a64b27a52f781c4f3751641e3dd65c7dd2fb5; version=8846739f52afa07e63395c80227dc544f54bd7b1 <4422fc2411cbbdf5104a914e0596bb483faea254; version=8846739f52afa07e63395c80227dc544f54bd7b1 <abe572f630bc1f0e77041012ab075869036ede4f

Published CVSS scores

5.5NIST NVDCVSS: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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

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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