CVE-2026-64003Network attack vector

Device-removal hang via skipped SCSI queue restart

Published Jul 19, 2026 · Updated Jul 19, 2026

Denial of service in the Linux kernel SCSI core allows remote attackers to hang SCSI device removal during host recovery. scsi_run_host_queues() iterates with shost_for_each_device(), whose scsi_device_get() filter skips SDEV_CANCEL devices and leaves their requeued commands unstarted. The host must be recovering while a partially removed SCSI device has queued requests; the bounded consequence is a device-removal hang.

CVSS severity7.5
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel SCSI core allows remote attackers to hang SCSI device removal during host recovery. scsi_run_host_queues() iterates with shost_for_each_device(), whose scsi_device_get() filter skips SDEV_CANCEL devices and leaves their requeued commands unstarted. The host must be recovering while a partially removed SCSI device has queued requests; the bounded consequence is a device-removal hang.

The record

CVE
CVE-2026-64003
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 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=6.5
  2. Affected versionversion=8b566edbdbfb5cde31a322c57932694ff48125ed <15fb19af49f2073ed77fad16aaabc648b0ca6800
  3. Affected versionversion=8b566edbdbfb5cde31a322c57932694ff48125ed <475f2b37a78f4c698967a7f14f325f04e24c9175
  4. Affected versionversion=8b566edbdbfb5cde31a322c57932694ff48125ed <7205b58702273baf21d6ba7992e6ba15852325f7
  5. Affected versionversion=8b566edbdbfb5cde31a322c57932694ff48125ed <c740e13e7fe32d8e4d9a1699f65b8daf6709895a
  6. Affected versionversion=8b566edbdbfb5cde31a322c57932694ff48125ed <d4dddfecdbb5467bef158d4e1486459808357fef

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.5; version=8b566edbdbfb5cde31a322c57932694ff48125ed <15fb19af49f2073ed77fad16aaabc648b0ca6800; version=8b566edbdbfb5cde31a322c57932694ff48125ed <475f2b37a78f4c698967a7f14f325f04e24c9175; version=8b566edbdbfb5cde31a322c57932694ff48125ed <7205b58702273baf21d6ba7992e6ba15852325f7; version=8b566edbdbfb5cde31a322c57932694ff48125ed <c740e13e7fe32d8e4d9a1699f65b8daf6709895a; version=8b566edbdbfb5cde31a322c57932694ff48125ed <d4dddfecdbb5467bef158d4e1486459808357fef

Published CVSS scores

7.5kernel.orgCVSS:3.1/AV:N/AC:L/PR:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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