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.
References8
- git.kernel.org/stable/c/0bc191050c3253da8ef4bfaf157c44efed6e22cd
- git.kernel.org/stable/c/329ec20a86091d2a6e5b4fe507545e7d678a22a2
- git.kernel.org/stable/c/3b0240483dc977dbec4f3bc7a5383d4691ecb625
- git.kernel.org/stable/c/444f96066937f3fdf0e79b53289cff223c7d638b
- git.kernel.org/stable/c/5876f38b67a309c00628942cb25679749b53b397
- git.kernel.org/stable/c/92f853f0645aebf1d05d333e97ab7c342ace1892
- git.kernel.org/stable/c/9bdc8dce4068dadbdf7cf5ad6d4983e2afffedce
- git.kernel.org/stable/c/ab438a9efb9042c79d2f8db28a326d55feb8591f
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 7 · as of 11 November 2026
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