---
title: "CVE-2026-89854: Linux kernel qla2xxx - Use After Free"
description: "Linux kernel scsi qla2xxx contains a use-after-free caused by dereferencing freed ha->cs84xx during host teardown, letting attackers cause memory corruption or denial of service, exploit requires concurrent sysfs attribute read during teardown."
url: https://panop.io/threat-heartbeat/CVE-2026-89854/
---

# CVE-2026-89854 Linux kernel qla2xxx - Use After Free

Linux kernel scsi qla2xxx contains a use-after-free caused by dereferencing freed ha->cs84xx during host teardown, letting attackers cause memory corruption or denial of service, exploit requires concurrent sysfs attribute read during teardown.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89854)

## Details

Type

Use After Free

Impact

Denial Of Service

CVSS vector

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

Published

16 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version with the fix applied.

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-2026-89854](https://nvd.nist.gov/vuln/detail/CVE-2026-89854)
- [https://git.kernel.org/stable/c/8c1ebcade6aac58137f2645b579894301febabf3](https://git.kernel.org/stable/c/8c1ebcade6aac58137f2645b579894301febabf3)
- [https://git.kernel.org/stable/c/ae09260be7454ed7630a913f147591a25e3a9d09](https://git.kernel.org/stable/c/ae09260be7454ed7630a913f147591a25e3a9d09)
- [https://git.kernel.org/stable/c/fcf0804dfe05862007189ac9dc4dc2063be36de1](https://git.kernel.org/stable/c/fcf0804dfe05862007189ac9dc4dc2063be36de1)
- [https://git.kernel.org/stable/c/122bf170c94a3797531b12fee580639a5dc893ed](https://git.kernel.org/stable/c/122bf170c94a3797531b12fee580639a5dc893ed)
- [https://git.kernel.org/stable/c/1d8bbc4344b9367d9d54731475d745fbc9ea28f2](https://git.kernel.org/stable/c/1d8bbc4344b9367d9d54731475d745fbc9ea28f2)
- [https://git.kernel.org/stable/c/2c3b17ee53f034936f7398dbf4d143e608b7c35c](https://git.kernel.org/stable/c/2c3b17ee53f034936f7398dbf4d143e608b7c35c)
- [https://git.kernel.org/stable/c/33d102102d925357c5fd172dd6672a27d74b3215](https://git.kernel.org/stable/c/33d102102d925357c5fd172dd6672a27d74b3215)
- [https://git.kernel.org/stable/c/8286a9095fb59751fba171afa2b4f590271c87d5](https://git.kernel.org/stable/c/8286a9095fb59751fba171afa2b4f590271c87d5)

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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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