iio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF

{
  "id": "502485569c169348c59f2bba37c196407d37745956eeba77b13fbf17e73aec68",
  "url": "https://osv.dev/vulnerability/CVE-2026-89938",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "iio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: iio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF The atlas driver requests its hardware data-ready IRQ with devm_request_threaded_irq(); its threaded handler queues an irq_work, atlas_work_handler(), that calls iio_trigger_poll(data->trig). The IRQ is devm-managed, so free_irq() runs from the devres unwind after atlas_remove() returns without flushing that irq_work. Once a buffer is enabled, conversion-complete IRQs keep firing and queueing it; a pending irq_work can therefore run after the unwind has freed atlas_data/indio_dev and the trigger, when atlas_work_handler() derives the atlas_data pointer via container_of() and dereferences data->trig, a use-after-free. Call iio_trigger_poll_nested() directly from the threaded handler instead of bouncing through irq_work. free_irq() then drains the threaded handler, closing the window; other iio drivers with a threaded data-ready IRQ do the same (e.g. bmi270). This issue was found by an in-house static analysis tool.",
    "evidence": "osv:CVE-2026-89938",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.157",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.110",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.51",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-89938",
      "aliases": [
        "CVE-2026-89938"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7103b99b031cb0ff6979331757bfc4893f37ae9e"
                },
                {
                  "fixed": "f64b437641b5a70c18bb0fd38da2b69d8926c871"
                },
                {
                  "fixed": "91e12b0fbd7047d02bf4ef4dbc491b9ef0159250"
                },
                {
                  "fixed": "2071624c3d0f497ca91da78858e6f30d7112fea6"
                },
                {
                  "fixed": "30b0d44c978bbc857bd68b71dab371805653de70"
                },
                {
                  "fixed": "be61c8c6252671ecf1fee0ad90f87669e0be1e20"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89938.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.8.0"
                },
                {
                  "fixed": "6.6.157"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "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"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89938.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.095781240Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2071624c3d0f497ca91da78858e6f30d7112fea6",
        "https://git.kernel.org/stable/c/30b0d44c978bbc857bd68b71dab371805653de70",
        "https://git.kernel.org/stable/c/91e12b0fbd7047d02bf4ef4dbc491b9ef0159250",
        "https://git.kernel.org/stable/c/be61c8c6252671ecf1fee0ad90f87669e0be1e20",
        "https://git.kernel.org/stable/c/f64b437641b5a70c18bb0fd38da2b69d8926c871",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89938.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-89938",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89938.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-89938",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491693,
  "published_at": "2026-09-16T10:32:27.012+00:00"
}