{"id":"CVE-2026-98343","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: fix use-after-free in dma_chan_put() and dma_release_channel()\n\nWhen dma_device_put() drops the last reference on chan->device->ref,\ndma_device_release() run…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: fix use-after-free in dma_chan_put() and dma_release_channel()\n\nWhen dma_device_put() drops the last reference on chan->device->ref,\ndma_device_release() run…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 < b92c502595336a3cc5bb7a060170891366745a5d","Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 < 855187a88bdf762c46b6849307597e3e02bfc1d9","Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 < c9780b601438137494b407eb4301bb3de2587ac9","Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 < 07eb075b60d565a5e465a1945a80cc62807492ad","Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 < 9319dd64d5cdef851841c091f30424faa2284c31","Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 < 6cf31716b77a71c0d634106f4f3951377b8dc6dc","Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 < 02bd02c585293634b213b142cba63cbf77891f6b","Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 < e873c74132f0c5f1452816cd9bb26208f0bba1e1","Linux 5.6"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:18:27.163","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98343","references":[{"url":"https://git.kernel.org/stable/c/02bd02c585293634b213b142cba63cbf77891f6b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/07eb075b60d565a5e465a1945a80cc62807492ad","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6cf31716b77a71c0d634106f4f3951377b8dc6dc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/855187a88bdf762c46b6849307597e3e02bfc1d9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9319dd64d5cdef851841c091f30424faa2284c31","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b92c502595336a3cc5bb7a060170891366745a5d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c9780b601438137494b407eb4301bb3de2587ac9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e873c74132f0c5f1452816cd9bb26208f0bba1e1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-06T08:50:17.400Z","slug":"CVE-2026-98343","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: fix use-after-free in dma_chan_put() and dma_release_channel()\n\nWhen dma_device_put() drops the last reference on chan->device->ref,\ndma_device_release() runs and may free the dma_device along with its\nchannels.\n\ndma_chan_put() then still reads chan->device->owner via\ndma_chan_to_owner() for the trailing module_put(). KASAN catches it:\n\n\tslab-use-after-free in dma_chan_put+0x3e6/0x4c0\n\tRead of size 8 by task insmod/6319\n\tFreed by task 6319:\n\t  kfree+0x225/0x470\n\t  dma_chan_put+0x395/0x4c0\n\t  dmaengine_put+0xf8/0x160\n\nCache the module owner in dma_chan_put() before the put so the trailing\nmodule_put() does not need chan->device.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}