CVE-2025-38399Network attack vector

Kernel crash via unchecked SCSI target pointer

Published Jul 25, 2025 · Updated Aug 5, 2026

NULL pointer dereference in the Linux kernel allows remote attackers to crash the kernel through a crafted SCSI PR OUT request. In core_scsi3_decode_spec_i_port(), the error path passes an unset dest_se_deve pointer to core_scsi3_lunacl_undepend_item() without checking for NULL. Exposure requires the kernel SCSI target path and a request that fails to locate the destination target portal group; the resulting kernel fault interrupts the host.

CVSS severity7.5
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel allows remote attackers to crash the kernel through a crafted SCSI PR OUT request. In core_scsi3_decode_spec_i_port(), the error path passes an unset dest_se_deve pointer to core_scsi3_lunacl_undepend_item() without checking for NULL. Exposure requires the kernel SCSI target path and a request that fails to locate the destination target portal group; the resulting kernel fault interrupts the host.

The record

CVE
CVE-2025-38399
Published
Jul 25, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=5.9
  2. Affected versionversion=f32ba612ef0f8eecaf6d2a5b04076ee7ea9ed039 <1129e0e0a833acf90429e0f13951068d5f026e4f
  3. Affected versionversion=f32ba612ef0f8eecaf6d2a5b04076ee7ea9ed039 <1627dda4d70ceb1ba62af2e401af73c09abb1eb5
  4. Affected versionversion=f32ba612ef0f8eecaf6d2a5b04076ee7ea9ed039 <55dfffc5e94730370b08de02c0cf3b7c951bbe9e
  5. Affected versionversion=f32ba612ef0f8eecaf6d2a5b04076ee7ea9ed039 <70ddb8133fdb512d4b1f2b4fd1c9e518514f182c
  6. Affected versionversion=f32ba612ef0f8eecaf6d2a5b04076ee7ea9ed039 <7296c938df2445f342be456a6ff0b3931d97f4e5
  7. Affected versionversion=f32ba612ef0f8eecaf6d2a5b04076ee7ea9ed039 <c412185d557578d3f936537ed639c4ffaaed4075
  8. Affected versionversion=f32ba612ef0f8eecaf6d2a5b04076ee7ea9ed039 <d8ab68bdb294b09a761e967dad374f2965e1913f

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.9; version=f32ba612ef0f8eecaf6d2a5b04076ee7ea9ed039 <1129e0e0a833acf90429e0f13951068d5f026e4f; version=f32ba612ef0f8eecaf6d2a5b04076ee7ea9ed039 <1627dda4d70ceb1ba62af2e401af73c09abb1eb5; version=f32ba612ef0f8eecaf6d2a5b04076ee7ea9ed039 <55dfffc5e94730370b08de02c0cf3b7c951bbe9e; version=f32ba612ef0f8eecaf6d2a5b04076ee7ea9ed039 <70ddb8133fdb512d4b1f2b4fd1c9e518514f182c; version=f32ba612ef0f8eecaf6d2a5b04076ee7ea9ed039 <7296c938df2445f342be456a6ff0b3931d97f4e5; version=f32ba612ef0f8eecaf6d2a5b04076ee7ea9ed039 <c412185d557578d3f936537ed639c4ffaaed4075; version=f32ba612ef0f8eecaf6d2a5b04076ee7ea9ed039 <d8ab68bdb294b09a761e967dad374f2965e1913f

Published CVSS scores

7.5kernel.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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