CVE-2026-90228Network attack vector

Remote kernel crash via file-backed ZNS identification

Published Sep 17, 2026 · Updated Sep 18, 2026

NULL pointer dereference in the Linux NVMe target allows remote authenticated users to crash the kernel via a crafted Identify command. nvmet_execute_identify_ns_zns() passes a NULL req->ns->bdev from a file-backed namespace to bdev_is_zoned(), causing a kernel oops. Exposure requires CONFIG_BLK_DEV_ZONED, a file-backed NVMe target namespace, and a host able to issue a ZNS-specific Identify request.

CVSS severity6.5
Medium
EPSS probability0.67%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux NVMe target allows remote authenticated users to crash the kernel via a crafted Identify command. nvmet_execute_identify_ns_zns() passes a NULL req->ns->bdev from a file-backed namespace to bdev_is_zoned(), causing a kernel oops. Exposure requires CONFIG_BLK_DEV_ZONED, a file-backed NVMe target namespace, and a host able to issue a ZNS-specific Identify request.

The record

CVE
CVE-2026-90228
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=5.14
  2. Affected versionversion=aaf2e048af2704da5869f27b508b288f36d5c7b7 <0b4cf43f9ca7118590a338de900edbd6047cd89f
  3. Affected versionversion=aaf2e048af2704da5869f27b508b288f36d5c7b7 <1ce8faf90eb0bf5599b90db38500aefea9426485
  4. Affected versionversion=aaf2e048af2704da5869f27b508b288f36d5c7b7 <1fb1236312ee1a600de6b3ca560f0b3fd5a50471
  5. Affected versionversion=aaf2e048af2704da5869f27b508b288f36d5c7b7 <b873099944dae5702b4b6db6814d1f1e8d4cfb00
  6. Affected versionversion=aaf2e048af2704da5869f27b508b288f36d5c7b7 <cc29f7082b7ab5e0337f27d1fef16359f05fcffa
  7. Affected versionversion=aaf2e048af2704da5869f27b508b288f36d5c7b7 <f594863967d87b7fcbff6e724d51135fd701a13d
  8. Affected versionversion=aaf2e048af2704da5869f27b508b288f36d5c7b7 <ff28a93a895912010a7827a0e1445ebe8be53b4d

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=aaf2e048af2704da5869f27b508b288f36d5c7b7 <0b4cf43f9ca7118590a338de900edbd6047cd89f; version=aaf2e048af2704da5869f27b508b288f36d5c7b7 <1ce8faf90eb0bf5599b90db38500aefea9426485; version=aaf2e048af2704da5869f27b508b288f36d5c7b7 <1fb1236312ee1a600de6b3ca560f0b3fd5a50471; version=aaf2e048af2704da5869f27b508b288f36d5c7b7 <b873099944dae5702b4b6db6814d1f1e8d4cfb00; version=aaf2e048af2704da5869f27b508b288f36d5c7b7 <cc29f7082b7ab5e0337f27d1fef16359f05fcffa; version=aaf2e048af2704da5869f27b508b288f36d5c7b7 <f594863967d87b7fcbff6e724d51135fd701a13d; version=aaf2e048af2704da5869f27b508b288f36d5c7b7 <ff28a93a895912010a7827a0e1445ebe8be53b4d

Published CVSS scores

6.5Amazon LinuxCVSS:3.1/AV:N/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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
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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