CVE-2026-90293Network attack vector

Kernel crash via premature iSER SCSI command

Published Sep 17, 2026 · Updated Sep 18, 2026

Denial of service in affected Linux kernels starting with 3.10 allows remote attackers to crash the kernel via an early iSER SCSI command. isert_put_login_tx posts receive buffers before session registration, letting target_submit dereference a NULL se_session se_tpg. The crash path requires a reachable iSER target over IB or RoCE, unauthenticated admission, and a command sent before the final Login Response.

CVSS severity7.5
High
EPSS probability0.69%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Linux kernels starting with 3.10 allows remote attackers to crash the kernel via an early iSER SCSI command. isert_put_login_tx posts receive buffers before session registration, letting target_submit dereference a NULL se_session se_tpg. The crash path requires a reachable iSER target over IB or RoCE, unauthenticated admission, and a command sent before the final Login Response.

The record

CVE
CVE-2026-90293
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

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 <068fe9841d2585b79d479fc7b58251d02d0b066f
  3. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <5247dde9daac7e107853b6fea043f7f47be033f7
  4. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <6c506fee5a5f2c8719c65bcfc5e5d0862b0a1946
  5. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <962edb9a6b0dae09d33a677485a398fc7d55968c
  6. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <9b2c61344992c8c2b883e1eebe416cc488a19390
  7. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <9c21a433022219ca899d1b3cd9049991f51a6a2c
  8. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <ad4492dcaf90a1d1a728ec5eef1a68ce5355027a
  9. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <d4f8257c3283919ca7e149381d062b9af5f7df7d

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.10; version=b8d26b3be8b33682cf163274ed07479a70554633 <068fe9841d2585b79d479fc7b58251d02d0b066f; version=b8d26b3be8b33682cf163274ed07479a70554633 <5247dde9daac7e107853b6fea043f7f47be033f7; version=b8d26b3be8b33682cf163274ed07479a70554633 <6c506fee5a5f2c8719c65bcfc5e5d0862b0a1946; version=b8d26b3be8b33682cf163274ed07479a70554633 <962edb9a6b0dae09d33a677485a398fc7d55968c; version=b8d26b3be8b33682cf163274ed07479a70554633 <9b2c61344992c8c2b883e1eebe416cc488a19390; version=b8d26b3be8b33682cf163274ed07479a70554633 <9c21a433022219ca899d1b3cd9049991f51a6a2c; version=b8d26b3be8b33682cf163274ed07479a70554633 <ad4492dcaf90a1d1a728ec5eef1a68ce5355027a; version=b8d26b3be8b33682cf163274ed07479a70554633 <d4f8257c3283919ca7e149381d062b9af5f7df7d

Published CVSS scores

7.5Linux 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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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