CVE-2026-98254 Linux Kernel - Data Corruption

Linux kernel contains a data corruption vulnerability caused by incorrect address adjustment in swiotlb_bounce() during highmem page lookup, letting attackers cause stale or incorrect DMA data, exploit requires crafted DMA operations.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.14% 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
6 October 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for swiotlb address adjustment.

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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