CVE-2026-90012 Linux Kernel spi - Denial of Service & Privilege Escalation

Linux kernel spi subsystem contains a buffer management vulnerability caused by improper DMA mapping ownership handling in __spi_map_msg(), letting attackers trigger kernel oops or memory corruption, exploit requires kernel-level access.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.63% chance of exploitation in 30 days
View the NVD record ↗

Details

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

Vendor fix

Update to the latest Linux kernel version containing the fix for DMA mapping ownership in spi subsystem.

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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