CVE-2025-38035Network attack vector

Remote denial of service via null callback restoration

Published Jun 18, 2025 · Updated Aug 5, 2026

NULL pointer dereference in the Linux NVMe/TCP target allows remote attackers to crash or hang the kernel through a TCP connection. During queue teardown after incomplete TLS setup, nvmet-tcp restores sk_state_change from a NULL queue->state_change pointer. The target must expose nvmet-tcp with TLS enabled; the failure occurs before authentication and provides no data read or write capability.

CVSS severity7.5
High
EPSS probability0.52%
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 NVMe/TCP target allows remote attackers to crash or hang the kernel through a TCP connection. During queue teardown after incomplete TLS setup, nvmet-tcp restores sk_state_change from a NULL queue->state_change pointer. The target must expose nvmet-tcp with TLS enabled; the failure occurs before authentication and provides no data read or write capability.

The record

CVE
CVE-2025-38035
Published
Jun 18, 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. Jun 18, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.0
  2. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <17e58be5b49f58bf17799a504f55c2d05ab2ecdc
  3. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <3a982ada411b8c52695f1784c3f4784771f30209
  4. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <46d22b47df2741996af277a2838b95f130436c13
  5. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <6265538446e2426f4bf3b57e91d7680b2047ddd9
  6. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <a21cb31642ffc84ca4ce55028212a96f72f54d30
  7. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <c240375587ddcc80e1022f52ee32b946bbc3a639
  8. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <ec462449f4cf616b0aa2ed119f5f44b5fdfcefab
  9. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <fc01b547c3f8bfa6e1d23cd5a2c63c736e8c3e4e

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.0; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <17e58be5b49f58bf17799a504f55c2d05ab2ecdc; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <3a982ada411b8c52695f1784c3f4784771f30209; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <46d22b47df2741996af277a2838b95f130436c13; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <6265538446e2426f4bf3b57e91d7680b2047ddd9; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <a21cb31642ffc84ca4ce55028212a96f72f54d30; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <c240375587ddcc80e1022f52ee32b946bbc3a639; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <ec462449f4cf616b0aa2ed119f5f44b5fdfcefab; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <fc01b547c3f8bfa6e1d23cd5a2c63c736e8c3e4e

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5Linux Kernel CNACVSS: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 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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