CVE-2026-98343

Description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: fix use-after-free in dma_chan_put() and dma_release_channel() When dma_device_put() drops the last reference on chan->device->ref, dma_device_release() runs and may free the dma_device along with its channels. dma_chan_put() then still reads chan->device->owner via dma_chan_to_owner() for the trailing module_put(). KASAN catches it: slab-use-after-free in dma_chan_put+0x3e6/0x4c0 Read of size 8 by task insmod/6319 Freed by task 6319: kfree+0x225/0x470 dma_chan_put+0x395/0x4c0 dmaengine_put+0xf8/0x160 Cache the module owner in dma_chan_put() before the put so the trailing module_put() does not need chan->device.

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EPSS — Exploit Prediction

0.0018

Probability of exploitation

0.07%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/02bd02c585293634b213b142cba63cbf77891f6b https://git.kernel.org/stable/c/07eb075b60d565a5e465a1945a80cc62807492ad https://git.kernel.org/stable/c/6cf31716b77a71c0d634106f4f3951377b8dc6dc https://git.kernel.org/stable/c/855187a88bdf762c46b6849307597e3e02bfc1d9 https://git.kernel.org/stable/c/9319dd64d5cdef851841c091f30424faa2284c31 https://git.kernel.org/stable/c/b92c502595336a3cc5bb7a060170891366745a5d https://git.kernel.org/stable/c/c9780b601438137494b407eb4301bb3de2587ac9 https://git.kernel.org/stable/c/e873c74132f0c5f1452816cd9bb26208f0bba1e1

Frequently Asked Questions

What is CVE-2026-98343? +

In the Linux kernel, the following vulnerability has been resolved: dmaengine: fix use-after-free in dma_chan_put() and dma_release_channel() When dma_device_put() drops the last reference on chan->device->ref, dma_device_release() runs and may free the dma_device along with its channels. dma_chan_put() then still reads chan->device->owner via dma_chan_to_owner() for the trailing module_put(). KASAN catches it: slab-use-after-free in dma_chan_put+0x3e6/0x4c0 Read of size 8 by task insmod/6319 Freed by task 6319: kfree+0x225/0x470 dma_chan_put+0x395/0x4c0 dmaengine_put+0xf8/0x160 Cache the module owner in dma_chan_put() before the put so the trailing module_put() does not need chan->device.

How do I check if I'm vulnerable to CVE-2026-98343? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.