---
title: "CVE-2026-90011: Linux Kernel scsi target iscsi - Out of Bounds Read"
description: "Linux kernel scsi target iscsi contains a buffer overflow caused by insufficient allocation for a NUL terminator in login payload buffer, letting unauthenticated initiators potentially read adjacent memory, exploit requires iscsi portal configured for CHAP authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-90011/
---

# CVE-2026-90011 Linux Kernel scsi target iscsi - Out of Bounds Read

Linux kernel scsi target iscsi contains a buffer overflow caused by insufficient allocation for a NUL terminator in login payload buffer, letting unauthenticated initiators potentially read adjacent memory, exploit requires iscsi portal configured for CHAP authentication.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.82% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90011)

## Details

Type

Out of Bounds Read

Impact

Information Disclosure

CVSS vector

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

Published

16 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version with the fix allocating an extra byte for NUL terminator.

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-2026-90011](https://nvd.nist.gov/vuln/detail/CVE-2026-90011)
- [https://git.kernel.org/stable/c/5fac79f248c37774d1dd761406f83d25ca6ff8e4](https://git.kernel.org/stable/c/5fac79f248c37774d1dd761406f83d25ca6ff8e4)
- [https://git.kernel.org/stable/c/6b589ef9d5f6cdc70d2b4f269ca6cf26b5ebb076](https://git.kernel.org/stable/c/6b589ef9d5f6cdc70d2b4f269ca6cf26b5ebb076)
- [https://git.kernel.org/stable/c/6ddddcad436d8e6e619204d3c848147ff2f5bf1e](https://git.kernel.org/stable/c/6ddddcad436d8e6e619204d3c848147ff2f5bf1e)
- [https://git.kernel.org/stable/c/b19dc17ed963ac36c0db4b52a1803fb11169f91f](https://git.kernel.org/stable/c/b19dc17ed963ac36c0db4b52a1803fb11169f91f)
- [https://git.kernel.org/stable/c/eb9dadf4d552ebe10644871c5189286552aa48f5](https://git.kernel.org/stable/c/eb9dadf4d552ebe10644871c5189286552aa48f5)
- [https://git.kernel.org/stable/c/f4825922d2fb371e2b969697d792077f1b62b62c](https://git.kernel.org/stable/c/f4825922d2fb371e2b969697d792077f1b62b62c)
- [https://git.kernel.org/stable/c/1624bff4c5118ad494d50ad94d44f22064667a7f](https://git.kernel.org/stable/c/1624bff4c5118ad494d50ad94d44f22064667a7f)
- [https://git.kernel.org/stable/c/3ddf3ea291a0ef2ea93b82e158960ac2cc42302b](https://git.kernel.org/stable/c/3ddf3ea291a0ef2ea93b82e158960ac2cc42302b)

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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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