CVE-2026-98975 Linux Kernel XFS - Data Corruption

Linux kernel XFS filesystem contains a reflink flag handling vulnerability caused by incorrect flag exchange during file mapping exchanges, letting attackers cause data corruption by triggering in-place writes instead of copy-on-write, exploit requires use of reflink file operations.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.21% chance of exploitation in 30 days
View the NVD record ↗

Details

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

Vendor fix

Update to the latest Linux kernel version containing the fix for reflink flag handling in XFS.

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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