CVE-2026-89994

7.8 HIGH

Published 2026-09-16 · Updated 2026-09-16

AI risk analysis

Summary: This flaw allows an attacker to trigger a kernel crash by injecting an event that dereferences a stale pointer, potentially leading to a denial of service.
Exploitability: Exploitation requires event injection capabilities and knowledge of the affected kernel version. The attacker must have the ability to inject events into the tracing subsystem.
Blast radius: If exploited, this could result in a system crash, impacting availability and potentially allowing an attacker to disrupt services.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the specific version 5.10.100 or later.

doskernelptr-deref

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: fsl-edma: tracing: no ptr dereference during log output The fsl edma events store a pointer to a struct fsl_edma_engine in the ringbuffer and dereference it when a log entry is printed. At this time, the pointer may no longer be valid. Event injection can be used to trigger a crash: $ cd /sys/kernel/tracing $ echo 'value = 0' > events/fsl_edma/edma_writeb/inject $ cat trace The log output needs only edma->membase. Add a membase field at the end of the event and use the new field for log output. Keep the existing fields for backward compatibility.

CVSS vector

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

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.