CVE-2026-89973Network attack vectorHinoki check available

Storage reset via unchecked C2HData direction

Published Sep 16, 2026 · Updated Sep 16, 2026

Denial of service in Linux nvme-tcp allows remote attackers controlling an NVMe/TCP target to reset connections via crafted C2HData PDUs. nvme_tcp_handle_c2h_data() finds a request by command ID but passes controller-supplied data to nvme_tcp_recv_data() without confirming that the request is a read. The target must answer an outstanding write with C2HData; the warning becomes a host panic only when panic_on_warn is enabled, otherwise the controller resets.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in Linux nvme-tcp allows remote attackers controlling an NVMe/TCP target to reset connections via crafted C2HData PDUs. nvme_tcp_handle_c2h_data() finds a request by command ID but passes controller-supplied data to nvme_tcp_recv_data() without confirming that the request is a read. The target must answer an outstanding write with C2HData; the warning becomes a host panic only when panic_on_warn is enabled, otherwise the controller resets.

The record

CVE
CVE-2026-89973
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=3f2304f8c6d6ed97849057bd16fee99e434ca796 <0673a2affe45ca76b60de31a83c67b1e60f81bde
  2. Affected versionversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <5b115d932f6e769ac80783fb18edd21b0aed256e
  3. Affected versionversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <80d56202fbdff8906be6954b2776e5c14a4026f2
  4. Affected versionversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <980d990f3c0560d7dfbfbf14699651fdf02f26ee
  5. Affected versionversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <a0c389b8a495bda1eb719d2503853c924b7a8355
  6. Affected versionversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <b4af7999a998787d5eb6facb5a333e04a4f1d2d9
  7. Affected versionversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <df74950ba6008655d4a977d17df7faf4b6e52b74
  8. Affected versionversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <f83af377c148f6ad94b41c0e8313f12adf45e1c1
  9. Affected versionversion=5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <0673a2affe45ca76b60de31a83c67b1e60f81bde; version=3f2304f8c6d6ed97849057bd16fee99e434ca796 <5b115d932f6e769ac80783fb18edd21b0aed256e; version=3f2304f8c6d6ed97849057bd16fee99e434ca796 <80d56202fbdff8906be6954b2776e5c14a4026f2; version=3f2304f8c6d6ed97849057bd16fee99e434ca796 <980d990f3c0560d7dfbfbf14699651fdf02f26ee; version=3f2304f8c6d6ed97849057bd16fee99e434ca796 <a0c389b8a495bda1eb719d2503853c924b7a8355; version=3f2304f8c6d6ed97849057bd16fee99e434ca796 <b4af7999a998787d5eb6facb5a333e04a4f1d2d9; version=3f2304f8c6d6ed97849057bd16fee99e434ca796 <df74950ba6008655d4a977d17df7faf4b6e52b74; version=3f2304f8c6d6ed97849057bd16fee99e434ca796 <f83af377c148f6ad94b41c0e8313f12adf45e1c1; version=5.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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
PrivilegesUnavailable
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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