CVE-2026-23296

SCSI host teardown hang via reference leak

Published Mar 25, 2026 · Updated Mar 25, 2026

Denial of service in the Linux Kernel allows local users to hang SCSI host teardown after SCSI device allocation fails. The scsi_alloc_sdev failure path omits kref_put after scsi_realloc_sdev_budget_map fails, leaving tagset_refcnt elevated. Reachability requires local low-privileged access and an SCSI device-allocation failure; the demonstrated consequence is an iscsid hang.

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

Denial of service in the Linux Kernel allows local users to hang SCSI host teardown after SCSI device allocation fails. The scsi_alloc_sdev failure path omits kref_put after scsi_realloc_sdev_budget_map fails, leaving tagset_refcnt elevated. Reachability requires local low-privileged access and an SCSI device-allocation failure; the demonstrated consequence is an iscsid hang.

The record

CVE
CVE-2026-23296
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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=2e7eb4c1e8af8385de22775bd0be552f59b28c9a
  2. Affected versionversion=5ce8fad941233e81f2afb5b52a3fcddd3ba8732f
  3. Affected versionversion=6.0
  4. Affected versionversion=8fe4ce5836e932f5766317cb651c1ff2a4cd0506 <1ac22c8eae81366101597d48360718dff9b9d980
  5. Affected versionversion=8fe4ce5836e932f5766317cb651c1ff2a4cd0506 <7c01b680beaf4d3143866b062b8e770e8b237fb8
  6. Affected versionversion=8fe4ce5836e932f5766317cb651c1ff2a4cd0506 <944a333c8e4d42256556c1d2ebb6d773a33e0dcd
  7. Affected versionversion=8fe4ce5836e932f5766317cb651c1ff2a4cd0506 <9f5e4abed9248448aa1b45b12ab0bea4d329b56a
  8. Affected versionversion=8fe4ce5836e932f5766317cb651c1ff2a4cd0506 <a03d96598d39fdf605d90731db3ef3b13fb8bdc8
  9. Affected versionversion=8fe4ce5836e932f5766317cb651c1ff2a4cd0506 <ec5c17c687b189dbc09dfdec11b669caa40bc395
  10. Affected versionversion=f818708eeeae793e12dc39f8984ed7732048a7d9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2e7eb4c1e8af8385de22775bd0be552f59b28c9a; version=5ce8fad941233e81f2afb5b52a3fcddd3ba8732f; version=6.0; version=8fe4ce5836e932f5766317cb651c1ff2a4cd0506 <1ac22c8eae81366101597d48360718dff9b9d980; version=8fe4ce5836e932f5766317cb651c1ff2a4cd0506 <7c01b680beaf4d3143866b062b8e770e8b237fb8; version=8fe4ce5836e932f5766317cb651c1ff2a4cd0506 <944a333c8e4d42256556c1d2ebb6d773a33e0dcd; version=8fe4ce5836e932f5766317cb651c1ff2a4cd0506 <9f5e4abed9248448aa1b45b12ab0bea4d329b56a; version=8fe4ce5836e932f5766317cb651c1ff2a4cd0506 <a03d96598d39fdf605d90731db3ef3b13fb8bdc8; version=8fe4ce5836e932f5766317cb651c1ff2a4cd0506 <ec5c17c687b189dbc09dfdec11b669caa40bc395; version=f818708eeeae793e12dc39f8984ed7732048a7d9

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

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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

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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