CVE-2026-68396

Local denial of service via SCSI wakeup race

Published Aug 10, 2026 · Updated Aug 10, 2026

Race condition in the Linux SCSI core from 5.5 allows local users to make storage error recovery hang after commands time out. The scsi_schedule_eh path sets the host error-recovery state and counts busy commands without ordering those operations against scsi_dec_host_busy, so each CPU can miss the condition that wakes the handler. Exploitation requires local low-privileged access and a driver that invokes scsi_schedule_eh; the stalled handler leaves SCSI error recovery unavailable.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux SCSI core from 5.5 allows local users to make storage error recovery hang after commands time out. The scsi_schedule_eh path sets the host error-recovery state and counts busy commands without ordering those operations against scsi_dec_host_busy, so each CPU can miss the condition that wakes the handler. Exploitation requires local low-privileged access and a driver that invokes scsi_schedule_eh; the stalled handler leaves SCSI error recovery unavailable.

The record

CVE
CVE-2026-68396
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-366, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=5.5
  2. Affected versionversion=6eb045e092efefafc6687409a6fa6d1dabf0fb69 <24d7abda6a2a19e113334accc10029f6a4b57257
  3. Affected versionversion=6eb045e092efefafc6687409a6fa6d1dabf0fb69 <866efe8ae8b8b4d095501001b026e1022734be28
  4. Affected versionversion=6eb045e092efefafc6687409a6fa6d1dabf0fb69 <c7a15091237205770bd9bd4d14eb1f3029d97a34
  5. Affected versionversion=6eb045e092efefafc6687409a6fa6d1dabf0fb69 <dccf3b1798b70f94e958b3d00b83010399e6fb05

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.5; version=6eb045e092efefafc6687409a6fa6d1dabf0fb69 <24d7abda6a2a19e113334accc10029f6a4b57257; version=6eb045e092efefafc6687409a6fa6d1dabf0fb69 <866efe8ae8b8b4d095501001b026e1022734be28; version=6eb045e092efefafc6687409a6fa6d1dabf0fb69 <c7a15091237205770bd9bd4d14eb1f3029d97a34; version=6eb045e092efefafc6687409a6fa6d1dabf0fb69 <dccf3b1798b70f94e958b3d00b83010399e6fb05

Published CVSS scores

5.5Red HatCVSS: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

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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-366Race Condition within a Thread
T1499.004Application or System Exploitation

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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