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 ↗

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

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