CVE-2026-99004

kernel: drm/imagination: Size page table preallocation by device address

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · October 23, 2026

Updated · October 30, 2026

Description

A flaw was found in the Imagination Technologies GPU driver (drm/imagination) in the Linux kernel. An integer underflow in the driver's page table calculation can lead to a Denial of Service (DoS). A local user can exploit this vulnerability when requesting memory mappings that cross page table boundaries, causing the driver to preallocate an excessive number of Memory Management Unit (MMU) pages. This action exhausts available system memory and triggers a kernel crash.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-191 · Integer Underflow (Wrap or Wraparound)