In the Linux kernel, the following vulnerability has been resolved: accel/ethosu: reject NPU_OP_RESIZE commands from userspace NPU_OP_RESIZE is a U85-only command that the driver does not yet implement. The existing WARN_ON(1) placeholder fires unconditionally whenever userspace submits this command via DRM_IOCTL_ETHOSU_GEM_CREATE, causing unbounded kernel log spam. If panic_on_warn is set the kernel panics, giving any unprivileged user with access to the DRM device a trivial denial-of-service primitive. Replace the WARN_ON(1) with an explicit -EINVAL return so the ioctl rejects the command before it reaches hardware.

A flaw was found in the Linux kernel's `accel/ethosu` driver. An unprivileged local user with access to the Direct Rendering Manager (DRM) device could submit a specific command (`NPU_OP_RESIZE`) that the driver does not properly handle. This could lead to excessive kernel log spam and, if the `panic_on_warn` setting is enabled, cause the kernel to crash, resulting in a denial of service (DoS).

Red Hat Enterprise Linux 10 Not affected kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Not affected kernel Red Hat Enterprise Linux 8 Not affected kernel-rt Red Hat Enterprise Linux 9 Not affected kernel Red Hat Enterprise Linux 9 Not affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-53169 https://nvd.nist.gov/vuln/detail/CVE-2026-53169 https://lore.kernel.org/linux-cve-announce/2026062551-CVE-2026-53169-4df9@gregkh/T