CVE-2026-98216 Linux Kernel - Denial of Service

Linux kernel contains a memory mapping vulnerability in IB/hfi1 PIO_CRED credit-return mmap caused by incorrect pointer arithmetic and improper DMA API usage, letting local users cause kernel Oops and send PIO stalls, exploit requires local access to affected hardware context.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.13% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Published
6 October 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for IB/hfi1 PIO_CRED credit-return mmap issue.

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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