---
title: "CVE-2026-90293: Linux Kernel IB/isert - Race Condition"
description: "Linux kernel IB/isert contains a race condition caused by posting full-feature receive buffers before session registration, letting initiators execute SCSI commands against uninitialized sessions, exploit requires initiator to send commands before final Login Response."
url: https://panop.io/threat-heartbeat/CVE-2026-90293/
---

# CVE-2026-90293 Linux Kernel IB/isert - Race Condition

Linux kernel IB/isert contains a race condition caused by posting full-feature receive buffers before session registration, letting initiators execute SCSI commands against uninitialized sessions, exploit requires initiator to send commands before final Login Response.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.69% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90293)

## Details

Type

Race Condition

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 latest Linux kernel version containing the patch that posts receive buffers after 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-2026-90293](https://nvd.nist.gov/vuln/detail/CVE-2026-90293)
- [https://git.kernel.org/stable/c/068fe9841d2585b79d479fc7b58251d02d0b066f](https://git.kernel.org/stable/c/068fe9841d2585b79d479fc7b58251d02d0b066f)
- [https://git.kernel.org/stable/c/5247dde9daac7e107853b6fea043f7f47be033f7](https://git.kernel.org/stable/c/5247dde9daac7e107853b6fea043f7f47be033f7)
- [https://git.kernel.org/stable/c/6c506fee5a5f2c8719c65bcfc5e5d0862b0a1946](https://git.kernel.org/stable/c/6c506fee5a5f2c8719c65bcfc5e5d0862b0a1946)
- [https://git.kernel.org/stable/c/962edb9a6b0dae09d33a677485a398fc7d55968c](https://git.kernel.org/stable/c/962edb9a6b0dae09d33a677485a398fc7d55968c)
- [https://git.kernel.org/stable/c/9b2c61344992c8c2b883e1eebe416cc488a19390](https://git.kernel.org/stable/c/9b2c61344992c8c2b883e1eebe416cc488a19390)
- [https://git.kernel.org/stable/c/9c21a433022219ca899d1b3cd9049991f51a6a2c](https://git.kernel.org/stable/c/9c21a433022219ca899d1b3cd9049991f51a6a2c)
- [https://git.kernel.org/stable/c/ad4492dcaf90a1d1a728ec5eef1a68ce5355027a](https://git.kernel.org/stable/c/ad4492dcaf90a1d1a728ec5eef1a68ce5355027a)
- [https://git.kernel.org/stable/c/d4f8257c3283919ca7e149381d062b9af5f7df7d](https://git.kernel.org/stable/c/d4f8257c3283919ca7e149381d062b9af5f7df7d)

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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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