Bug 2516293 (CVE-2026-72476) - CVE-2026-72476 kernel: dmaengine: Fix possible use after free
Summary: CVE-2026-72476 kernel: dmaengine: Fix possible use after free
Keywords:
Status: NEW
Alias: CVE-2026-72476
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-15 06:04 UTC by OSIDB Bzimport
Modified: 2026-09-03 14:08 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-15 06:04:57 UTC 
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.
Comment 1 gkamathe 2026-08-19 13:24:42 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081536-CVE-2026-72476-d0b7@gregkh/T
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