CVE-2026-72476

HighCVSS 7.8

Published: 15/08/2026(UTC)Updated: 17/08/2026(UTC)Translated: 15/08/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.17%

7th percentile - higher than 7% of all known CVEs

Summary

In the Linux kernel, the dma_release_channel() function has a use-after-free vulnerability. The privatecnt check occurs after calling dma_chan_put(), which may release the last reference to the device if the DMA provider is already gone, leading to memory free. The fix moves dma_chan_put() before the check.

Risk Assessment

The vulnerability could lead to system crash or potential arbitrary code execution in kernel context, posing a serious risk to system integrity and availability.

Recommendation

Apply the official Linux kernel patch that moves dma_chan_put() before the privatecnt check. Update the system to a kernel version containing the fix.

Original NVD description (English source)

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.