---
title: "CVE-2026-90294: Linux Kernel IB/isert - Denial of Service"
description: "Linux kernel IB/isert contains a null pointer dereference caused by sending the final Login Response before session registration in isert_put_login_tx(), letting remote attackers cause a kernel oops and denial of service, exploit requires sending a SCSI command immediately after login response."
url: https://panop.io/threat-heartbeat/CVE-2026-90294/
---

# CVE-2026-90294 Linux Kernel IB/isert - Denial of Service

Linux kernel IB/isert contains a null pointer dereference caused by sending the final Login Response before session registration in isert\_put\_login\_tx(), letting remote attackers cause a kernel oops and denial of service, exploit requires sending a SCSI command immediately after login response.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.68% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90294)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the Linux kernel version including the patch that delays the final Login Response until session registration.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-90294](https://nvd.nist.gov/vuln/detail/CVE-2026-90294)
- [https://git.kernel.org/stable/c/a18fb8d540b3e631cb7e50e55f3c462c05b3a114](https://git.kernel.org/stable/c/a18fb8d540b3e631cb7e50e55f3c462c05b3a114)
- [https://git.kernel.org/stable/c/a6c19af05c170f267eca1d01c3c72c84ba7860ae](https://git.kernel.org/stable/c/a6c19af05c170f267eca1d01c3c72c84ba7860ae)
- [https://git.kernel.org/stable/c/e148dbac43308d9e4313070bfc5b355d03134809](https://git.kernel.org/stable/c/e148dbac43308d9e4313070bfc5b355d03134809)
- [https://git.kernel.org/stable/c/f84e9adf4d9f4c0c79ef4a7d9e0c5c08b1337033](https://git.kernel.org/stable/c/f84e9adf4d9f4c0c79ef4a7d9e0c5c08b1337033)
- [https://git.kernel.org/stable/c/0d2efc355982064855f24f73f9fbb6c65ca4a5c7](https://git.kernel.org/stable/c/0d2efc355982064855f24f73f9fbb6c65ca4a5c7)
- [https://git.kernel.org/stable/c/11694889c4bab47047a60690ceb70d7551ed5b2e](https://git.kernel.org/stable/c/11694889c4bab47047a60690ceb70d7551ed5b2e)
- [https://git.kernel.org/stable/c/4397ea31e3b0d017c2b9b876b326df0b3eb845bf](https://git.kernel.org/stable/c/4397ea31e3b0d017c2b9b876b326df0b3eb845bf)
- [https://git.kernel.org/stable/c/464f5afa92d071a226f88424803b0fcf88093ede](https://git.kernel.org/stable/c/464f5afa92d071a226f88424803b0fcf88093ede)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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