---
title: "CVE-2026-89456: Linux Kernel s390/dasd - Data Tampering"
description: "Linux kernel s390/dasd contains a data tampering vulnerability caused by loss of partial completion length during ERP recovery in dasd_default_erp_postaction, letting attackers receive zeroed data instead of actual data, exploit requires specific ERP recovery conditions."
url: https://panop.io/threat-heartbeat/CVE-2026-89456/
---

# CVE-2026-89456 Linux Kernel s390/dasd - Data Tampering

Linux kernel s390/dasd contains a data tampering vulnerability caused by loss of partial completion length during ERP recovery in dasd\_default\_erp\_postaction, letting attackers receive zeroed data instead of actual data, exploit requires specific ERP recovery conditions.

CVSS base score 7.0 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.15% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89456)

## Details

Type

Data Tampering

Impact

Data Tampering

CVSS vector

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

Published

11 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix.

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-2026-89456](https://nvd.nist.gov/vuln/detail/CVE-2026-89456)
- [https://git.kernel.org/stable/c/ceafb262475ac6cb3a7d07b1102608be2b216b99](https://git.kernel.org/stable/c/ceafb262475ac6cb3a7d07b1102608be2b216b99)
- [https://git.kernel.org/stable/c/d6b8778b1b82aa3a8dbf8612080f635b834bd16b](https://git.kernel.org/stable/c/d6b8778b1b82aa3a8dbf8612080f635b834bd16b)
- [https://git.kernel.org/stable/c/6b0954c8a259da1e4aa745989f82723947acfb46](https://git.kernel.org/stable/c/6b0954c8a259da1e4aa745989f82723947acfb46)
- [https://git.kernel.org/stable/c/9e063165d3fe58db2a517717b830f17e82d03467](https://git.kernel.org/stable/c/9e063165d3fe58db2a517717b830f17e82d03467)
- [https://git.kernel.org/stable/c/d0a2f97d8c97134aa7f6a191940b7bab4bb42f5f](https://git.kernel.org/stable/c/d0a2f97d8c97134aa7f6a191940b7bab4bb42f5f)
- [https://git.kernel.org/stable/c/f735b9710f0c8fe72c1060103e865f4ae678190b](https://git.kernel.org/stable/c/f735b9710f0c8fe72c1060103e865f4ae678190b)
- [https://git.kernel.org/stable/c/15ec03452c18e8d288e519837d21b308300d74b2](https://git.kernel.org/stable/c/15ec03452c18e8d288e519837d21b308300d74b2)
- [https://git.kernel.org/stable/c/6fb5ba2e7e43173a3761e46f091070a8185efa14](https://git.kernel.org/stable/c/6fb5ba2e7e43173a3761e46f091070a8185efa14)

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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

Panop answers these inside your environment, for this CVE and every other finding.

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