CVE-2026-72476

dmaengine: Fix possible use after free

State: Published
Severity: 7.8 High
Published: Aug 15, 2026
Updated: Oct 16, 2026
Reserved: Aug 9, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	0f571515c332e00b3515dbe0859ceaa30ab66e00 to before 444f96066937f3fdf0e79b53289cff223c7d638bAffected 0f571515c332e00b3515dbe0859ceaa30ab66e00 to before ab438a9efb9042c79d2f8db28a326d55feb8591fAffected 0f571515c332e00b3515dbe0859ceaa30ab66e00 to before 9bdc8dce4068dadbdf7cf5ad6d4983e2afffedceAffected 0f571515c332e00b3515dbe0859ceaa30ab66e00 to before 5876f38b67a309c00628942cb25679749b53b397Affected 0f571515c332e00b3515dbe0859ceaa30ab66e00 to before 3b0240483dc977dbec4f3bc7a5383d4691ecb625Affected 0f571515c332e00b3515dbe0859ceaa30ab66e00 to before 329ec20a86091d2a6e5b4fe507545e7d678a22a2Affected 0f571515c332e00b3515dbe0859ceaa30ab66e00 to before 0bc191050c3253da8ef4bfaf157c44efed6e22cdAffected 0f571515c332e00b3515dbe0859ceaa30ab66e00 to before 92f853f0645aebf1d05d333e97ab7c342ace1892Affected
LinuxLinux	2.6.30Affected before 2.6.30Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.97 through 6.12.Not affected 6.18.40 through 6.18.Not affected 7.1.5 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

0f571515c332e00b3515dbe0859ceaa30ab66e00 to before 444f96066937f3fdf0e79b53289cff223c7d638bAffected
0f571515c332e00b3515dbe0859ceaa30ab66e00 to before ab438a9efb9042c79d2f8db28a326d55feb8591fAffected
0f571515c332e00b3515dbe0859ceaa30ab66e00 to before 9bdc8dce4068dadbdf7cf5ad6d4983e2afffedceAffected
0f571515c332e00b3515dbe0859ceaa30ab66e00 to before 5876f38b67a309c00628942cb25679749b53b397Affected
0f571515c332e00b3515dbe0859ceaa30ab66e00 to before 3b0240483dc977dbec4f3bc7a5383d4691ecb625Affected
0f571515c332e00b3515dbe0859ceaa30ab66e00 to before 329ec20a86091d2a6e5b4fe507545e7d678a22a2Affected
0f571515c332e00b3515dbe0859ceaa30ab66e00 to before 0bc191050c3253da8ef4bfaf157c44efed6e22cdAffected
0f571515c332e00b3515dbe0859ceaa30ab66e00 to before 92f853f0645aebf1d05d333e97ab7c342ace1892Affected

LinuxLinux

2.6.30Affected
before 2.6.30Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.97 through 6.12.*Not affected
6.18.40 through 6.18.*Not affected
7.1.5 through 7.1.*Not affected
7.2 and laterNot affected

References

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