CVE-2026-89804 Linux Kernel - Resource Leak

Linux kernel contains a mismatched DMA unmap size vulnerability in drm/nouveau/dmem caused by incorrect unmap size for large folios, letting attackers cause resource leaks, exploit requires kernel-level access.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.17% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Resource Leak
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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.

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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