{"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":"high","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"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98343.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98343"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2546500"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98343"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98343"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98343.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-10-06T08:50:17.400Z","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":["CWE-825"],"epss":0.00177,"epssPercentile":0.07171,"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.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-10-10 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98343.json)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":219131,"id":"CVE-2026-98343","ts":1791707070175,"field":"cvss","old":null,"new":"7"},{"seq":219130,"id":"CVE-2026-98343","ts":1791707070175,"field":"severity","old":"none","new":"high"}]}