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CVE-2026-93180

kernel: drm/panthor: Fix NPD issue on partial unmap of an evicted BO

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 17, 2026

Updated · October 20, 2026

Description

A flaw was found in the panthor component of the Linux kernel. A local attacker could exploit this vulnerability by performing a partial unmap of an evicted Buffer Object (BO) when the Graphics Processing Unit (GPU) mapping is split. This occurs because the logic for handling partial unmap of huge pages is not completely skipped for the Virtual Memory Area (VMA) of an evicted BO. Successful exploitation leads to a NULL pointer dereference, causing a system crash and a denial of service (DoS).

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-476 · NULL Pointer Dereference