{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "3e26d9f08fbe0b73e951a5e810fdb7a332b7e37f"
            },
            {
              "fixed": "311595dc0b5621f74d8eb4dc38ef4efcdfe7e769"
            },
            {
              "fixed": "06a9460b8b792e109cbc934a856d02e5cff217ef"
            },
            {
              "fixed": "11cef99491117d4264603df159c4ff5f3845a059"
            },
            {
              "fixed": "8662e56c31cf23b61ca3d11b516efb94c35b8026"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.11.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.51"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89941.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: buffer: Make IIO DMA fence release RCU-safe\n\nThe `dma_fence` documentation states that if a custom release\nimplementation is provided, the `dma_fence` object must be freed in an\nRCU-safe way. The current `iio_dma_fence` implementation uses `kfree()`,\nwhich might result in a use-after-free.\n\nRemove the custom `release` implementation. This makes the DMA fence core\nfall back to `dma_fence_free()`, which calls `kfree_rcu()` on the fence.\nThis requires that the fence be the first member of `struct iio_dma_fence`.\n\nUsing the default release method for extended DMA fence structures is a\ncommon pattern.",
  "id": "CVE-2026-89941",
  "modified": "2026-09-18T03:30:58.619252181Z",
  "published": "2026-09-16T10:32:29.148Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/06a9460b8b792e109cbc934a856d02e5cff217ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/11cef99491117d4264603df159c4ff5f3845a059"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/311595dc0b5621f74d8eb4dc38ef4efcdfe7e769"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8662e56c31cf23b61ca3d11b516efb94c35b8026"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89941.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89941"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "iio: buffer: Make IIO DMA fence release RCU-safe"
}