CVE-2026-99081 Linux kernel bnxt_en - Denial of Service

Linux kernel bnxt_en driver contains a DMA buffer overrun caused by incorrect DMA mapping length for padded small packets, letting attackers trigger Intel IOMMU DMA read faults on BCM57412 NetXtreme-E NICs, exploit requires sending small packets near 4KB page boundaries.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.21% 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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
23 October 2026
Updated
25 October 2026

Vendor fix

Update to the Linux kernel version containing the fix for bnxt_en DMA mapping length for padded small packets.

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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