CVE-2026-90294Network attack vectorHinoki check available

Kernel crash via premature iSER command handling

Published Sep 17, 2026 · Updated Sep 18, 2026

A race condition in Linux allows remote attackers to crash the kernel by sending a SCSI command immediately after iSER login. isert_put_login_tx() sends the final Login Response before __transport_register_session() initializes se_session.se_tpg, so the first command reaches target_submit() with a null target portal group. Exposure requires an enabled Linux iSER target and an initiator that submits a command without waiting; the null dereference oopses the ib-comp-wq worker and interrupts host service.

CVSS severityUnavailable
Unscored
EPSS probability0.68%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

A race condition in Linux allows remote attackers to crash the kernel by sending a SCSI command immediately after iSER login. isert_put_login_tx() sends the final Login Response before __transport_register_session() initializes se_session.se_tpg, so the first command reaches target_submit() with a null target portal group. Exposure requires an enabled Linux iSER target and an initiator that submits a command without waiting; the null dereference oopses the ib-comp-wq worker and interrupts host service.

The record

CVE
CVE-2026-90294
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
network
Privileges
Unavailable

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=3.10
  2. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <0d2efc355982064855f24f73f9fbb6c65ca4a5c7
  3. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <11694889c4bab47047a60690ceb70d7551ed5b2e
  4. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <4397ea31e3b0d017c2b9b876b326df0b3eb845bf
  5. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <464f5afa92d071a226f88424803b0fcf88093ede
  6. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <a18fb8d540b3e631cb7e50e55f3c462c05b3a114
  7. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <a6c19af05c170f267eca1d01c3c72c84ba7860ae
  8. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <e148dbac43308d9e4313070bfc5b355d03134809
  9. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <f84e9adf4d9f4c0c79ef4a7d9e0c5c08b1337033

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=3.10; version=b8d26b3be8b33682cf163274ed07479a70554633 <0d2efc355982064855f24f73f9fbb6c65ca4a5c7; version=b8d26b3be8b33682cf163274ed07479a70554633 <11694889c4bab47047a60690ceb70d7551ed5b2e; version=b8d26b3be8b33682cf163274ed07479a70554633 <4397ea31e3b0d017c2b9b876b326df0b3eb845bf; version=b8d26b3be8b33682cf163274ed07479a70554633 <464f5afa92d071a226f88424803b0fcf88093ede; version=b8d26b3be8b33682cf163274ed07479a70554633 <a18fb8d540b3e631cb7e50e55f3c462c05b3a114; version=b8d26b3be8b33682cf163274ed07479a70554633 <a6c19af05c170f267eca1d01c3c72c84ba7860ae; version=b8d26b3be8b33682cf163274ed07479a70554633 <e148dbac43308d9e4313070bfc5b355d03134809; version=b8d26b3be8b33682cf163274ed07479a70554633 <f84e9adf4d9f4c0c79ef4a7d9e0c5c08b1337033

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

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.

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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
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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