CVE-2026-89558 Linux Kernel md/raid10 - Data Corruption

Linux kernel md/raid10 contains a logic error caused by incorrect boolean assignment in raid10_sync_request(), letting attackers cause silent data corruption during device recovery, exploit requires degraded RAID10 array with device failure.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.64% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Data Corruption
Impact
Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
11 September 2026
Updated
15 October 2026

Vendor fix

Update to the Linux kernel version containing the fix for commit fe6a19d40ceb or later.

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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