{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "2ba05622b8b143b0c95968ba59bddfbd6d2f2559"
            },
            {
              "fixed": "ac8ce9f89638d6d79875cca7d8ae42566a9bde15"
            },
            {
              "fixed": "14578c78405d51fa92e4ada4502a45f537c0fcb8"
            },
            {
              "fixed": "cbb3310a5167e868a5e763e32b9a23b4d50669ee"
            },
            {
              "fixed": "8577a5ec4f7e00443015ef99f646def093121a1b"
            },
            {
              "fixed": "4448a539a0c39141cccc67be6cacde0f35024313"
            },
            {
              "fixed": "fc1f4884f1d46fc7a8cee6e2997ecc9e8d1c7f77"
            },
            {
              "fixed": "4aed7e47a10b94ea3c5171e8d1382081accd2e03"
            },
            {
              "fixed": "dc750422170a563c7a81f6e49d36bb02c62ae37f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.29"
            },
            {
              "fixed": "5.10.271"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.222"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.189"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.158"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.54"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98342.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: wait for RCU readers before releasing dma_device\n\ndma_issue_pending_all() walks the dma_device_list with\nlist_for_each_entry_rcu() under rcu_read_lock(). dma_device_release()\nunlinks the device with list_del_rcu() and then calls\ndevice-\u003edevice_release() (which in many drivers, such as plx_dma.c,\ndirectly calls kfree()).\n\nBecause there is no grace period between unlinking the device and\nfreeing it, concurrent RCU readers in dma_issue_pending_all() can\naccess the device after it has been freed.\n\nThe lockless walk originally relied on clients holding a dmaengine\nreference to pin the provider module, and therefore the device, for as\nlong as they might traverse the list. Commit 8ad342a86359 (\"dmaengine:\nAdd reference counting to dma_device struct\") decoupled the dma_device\nlifetime from the module reference, so the device can now be released\nwhile a reader is still walking the list.\n\nAdd synchronize_rcu() before the device is freed, so RCU readers are\nguaranteed to have finished. Keep it unconditional: providers that do\nnot implement device_release() free the device themselves once\ndma_async_device_unregister() returns. This call will delay for a grace\nperiod with dma_list_mutex held, which is safe and only teardown path is\ndelayed.",
  "id": "CVE-2026-98342",
  "modified": "2026-10-07T02:30:40.206464975Z",
  "published": "2026-10-06T08:46:32.366Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/14578c78405d51fa92e4ada4502a45f537c0fcb8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4448a539a0c39141cccc67be6cacde0f35024313"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4aed7e47a10b94ea3c5171e8d1382081accd2e03"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8577a5ec4f7e00443015ef99f646def093121a1b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac8ce9f89638d6d79875cca7d8ae42566a9bde15"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cbb3310a5167e868a5e763e32b9a23b4d50669ee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc750422170a563c7a81f6e49d36bb02c62ae37f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fc1f4884f1d46fc7a8cee6e2997ecc9e8d1c7f77"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98342.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98342"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "dmaengine: wait for RCU readers before releasing dma_device"
}