EUVD-2026-39260
GHSA-jhr3-25h7-qp3m
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AV:L and PR:L for local DRM access; AC:H because kernel panic (A:H) requires non-default panic_on_warn boot parameter; no confidentiality or integrity impact.
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
5DescriptionNVD
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.
AnalysisAI
Unbounded kernel log spam and conditional kernel panic in the Linux kernel's accel/ethosu Arm Ethos-U NPU driver allows any local unprivileged user with DRM device access to exhaust kernel log resources or crash the system. The driver's unimplemented NPU_OP_RESIZE command handler contains an unconditional WARN_ON(1) that fires every time userspace submits this operation via DRM_IOCTL_ETHOSU_GEM_CREATE. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must have local access to the Arm Ethos-U DRM device node (typically /dev/dri/renderD128 or similar), which on many Linux systems is accessible to members of the 'render' or 'video' group without root privileges. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD-assigned CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, score 5.5) reflects the log-spam availability impact reachable under default conditions. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A local user with read-write access to the DRM device node opens the ethosu DRM device and issues DRM_IOCTL_ETHOSU_GEM_CREATE with an NPU_OP_RESIZE command type. The driver's unimplemented handler fires WARN_ON(1) on every call, flooding the kernel ring buffer; if panic_on_warn is set in the kernel command line, the first such call crashes the kernel, denying service to all users on the system. … |
| Remediation | The upstream fix is available in Linux kernel 7.0.13 and 7.1 (stable commits 70090a32 and ef911805 respectively), which replaces the unconditional WARN_ON(1) with an explicit -EINVAL return, causing the ioctl to reject NPU_OP_RESIZE before it reaches hardware. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-617 – Reachable Assertion
View allSame technique Information Disclosure
View allShare
External POC / Exploit Code
Leaving vuln.today