Bug 2492734 (CVE-2026-53169)

Summary: CVE-2026-53169 kernel: accel/ethosu: reject NPU_OP_RESIZE commands from userspace
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
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).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-06-25 10:02:57 UTC 
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.
Comment 1 TEJ RATHI 2026-06-26 07:14:02 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062551-CVE-2026-53169-4df9@gregkh/T