Vulnerability-Lookup

CVE-2026-89938 (GCVE-0-2026-89938)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:32 – Updated: 2026-09-16 14:40

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.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

5 references

URL	Tags
https://git.kernel.org/stable/c/f64b437641b5a70c1…
https://git.kernel.org/stable/c/91e12b0fbd7047d02…
https://git.kernel.org/stable/c/2071624c3d0f497ca…
https://git.kernel.org/stable/c/30b0d44c978bbc857…
https://git.kernel.org/stable/c/be61c8c6252671ecf…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 7103b99b031cb0ff6979331757bfc4893f37ae9e , < f64b437641b5a70c18bb0fd38da2b69d8926c871 (git) Affected: 7103b99b031cb0ff6979331757bfc4893f37ae9e , < 91e12b0fbd7047d02bf4ef4dbc491b9ef0159250 (git) Affected: 7103b99b031cb0ff6979331757bfc4893f37ae9e , < 2071624c3d0f497ca91da78858e6f30d7112fea6 (git) Affected: 7103b99b031cb0ff6979331757bfc4893f37ae9e , < 30b0d44c978bbc857bd68b71dab371805653de70 (git) Affected: 7103b99b031cb0ff6979331757bfc4893f37ae9e , < be61c8c6252671ecf1fee0ad90f87669e0be1e20 (git)	guessed
Linux	Linux	Affected: 4.8 Unaffected: 0 , < 4.8 (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.51 , ≤ 6.18.* (semver) Unaffected: 7.2.5 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iio/chemical/atlas-sensor.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f64b437641b5a70c18bb0fd38da2b69d8926c871",
              "status": "affected",
              "version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
              "versionType": "git"
            },
            {
              "lessThan": "91e12b0fbd7047d02bf4ef4dbc491b9ef0159250",
              "status": "affected",
              "version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
              "versionType": "git"
            },
            {
              "lessThan": "2071624c3d0f497ca91da78858e6f30d7112fea6",
              "status": "affected",
              "version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
              "versionType": "git"
            },
            {
              "lessThan": "30b0d44c978bbc857bd68b71dab371805653de70",
              "status": "affected",
              "version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
              "versionType": "git"
            },
            {
              "lessThan": "be61c8c6252671ecf1fee0ad90f87669e0be1e20",
              "status": "affected",
              "version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iio/chemical/atlas-sensor.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.51",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.5",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF\n\nThe atlas driver requests its hardware data-ready IRQ with\ndevm_request_threaded_irq(); its threaded handler queues an irq_work,\natlas_work_handler(), that calls iio_trigger_poll(data-\u003etrig).\n\nThe IRQ is devm-managed, so free_irq() runs from the devres unwind after\natlas_remove() returns without flushing that irq_work.  Once a buffer is\nenabled, conversion-complete IRQs keep firing and queueing it; a pending\nirq_work can therefore run after the unwind has freed atlas_data/indio_dev\nand the trigger, when atlas_work_handler() derives the atlas_data pointer\nvia container_of() and dereferences data-\u003etrig, a use-after-free.\n\nCall iio_trigger_poll_nested() directly from the threaded handler instead\nof bouncing through irq_work.  free_irq() then drains the threaded handler,\nclosing the window; other iio drivers with a threaded data-ready IRQ do the\nsame (e.g. bmi270).\n\nThis issue was found by an in-house static analysis tool."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The use-after-free is reached from local IIO sysfs/chardev buffer enable on the Atlas I2C chemical sensor plus driver teardown (sysfs unbind, rmmod, or parent adapter removal). There is no network, Bluetooth, or remote-protocol path into atlas_interrupt_handler or atlas_work_handler.\nAC:L - With the IIO buffer enabled, conversion-complete IRQs keep queueing irq_work every 450-650ms. atlas_remove() never calls irq_work_sync(), so pending work runs after the synchronous devres unwind frees atlas_data. The attacker controls buffer enable and bind/unbind retries; on PREEMPT_RT or CPUs without an irq_work IPI the window is milliseconds.\nPR:L - IIO buffer/enable is mode 0644 with no capability check, and on industrial/IoT water-quality systems that ship Atlas OEM SM sensors those nodes are commonly group-accessible to monitoring services. Per driver-removal UAF scoring, an unprivileged local user can drive the IRQ/irq_work side while teardown proceeds; init-namespace root is not required.\nUI:N - The attacker enables the IIO buffer themselves and coordinates driver unbind or module teardown; no separate victim action such as plugging hardware or mounting a filesystem is required.\nS:U - The use-after-free corrupts kernel heap objects (atlas_data and the IIO trigger) in the host kernel\u0027s own security authority. This is a standard local kernel privilege-escalation path, not a VM, IOMMU, or sandbox boundary crossing.\nC:H - atlas_work_handler() recovers freed atlas_data via container_of() and dereferences data-\u003etrig. A use-after-free of that sprayable driver-private object yields an arbitrary kernel read primitive, including via iio_trigger_poll() walking attacker-controlled trigger state.\nI:H - After spraying the freed atlas_data, data-\u003etrig is attacker-controlled, so iio_trigger_poll() performs atomic updates and generic_handle_irq() on attacker-chosen IRQ numbers. That is an arbitrary kernel write and control-flow hijack primitive, consistent with use-after-free scoring.\nA:H - The pending irq_work running against freed atlas_data and the IIO trigger causes a kernel oops or panic (KASAN use-after-free or a wild dereference of data-\u003etrig), so availability impact is high even without a full exploit."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T14:40:24.952Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f64b437641b5a70c18bb0fd38da2b69d8926c871"
        },
        {
          "url": "https://git.kernel.org/stable/c/91e12b0fbd7047d02bf4ef4dbc491b9ef0159250"
        },
        {
          "url": "https://git.kernel.org/stable/c/2071624c3d0f497ca91da78858e6f30d7112fea6"
        },
        {
          "url": "https://git.kernel.org/stable/c/30b0d44c978bbc857bd68b71dab371805653de70"
        },
        {
          "url": "https://git.kernel.org/stable/c/be61c8c6252671ecf1fee0ad90f87669e0be1e20"
        }
      ],
      "title": "iio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89938",
    "datePublished": "2026-09-16T10:32:27.012Z",
    "dateReserved": "2026-09-11T19:38:34.776Z",
    "dateUpdated": "2026-09-16T14:40:24.952Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "microsoft_vex": {
      "current_release_date": "2026-09-17T01:02:06.000Z",
      "cve": "CVE-2026-89938",
      "id": "msrc_CVE-2026-89938",
      "initial_release_date": "2026-09-17T01:02:06.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "iio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89938.json",
      "version": "1"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-89938\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-16T11:17:03.323\",\"lastModified\":\"2026-09-16T15:18:19.210\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\niio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF\\n\\nThe atlas driver requests its hardware data-ready IRQ with\\ndevm_request_threaded_irq(); its threaded handler queues an irq_work,\\natlas_work_handler(), that calls iio_trigger_poll(data-\u003etrig).\\n\\nThe IRQ is devm-managed, so free_irq() runs from the devres unwind after\\natlas_remove() returns without flushing that irq_work.  Once a buffer is\\nenabled, conversion-complete IRQs keep firing and queueing it; a pending\\nirq_work can therefore run after the unwind has freed atlas_data/indio_dev\\nand the trigger, when atlas_work_handler() derives the atlas_data pointer\\nvia container_of() and dereferences data-\u003etrig, a use-after-free.\\n\\nCall iio_trigger_poll_nested() directly from the threaded handler instead\\nof bouncing through irq_work.  free_irq() then drains the threaded handler,\\nclosing the window; other iio drivers with a threaded data-ready IRQ do the\\nsame (e.g. bmi270).\\n\\nThis issue was found by an in-house static analysis tool.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/iio/chemical/atlas-sensor.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"7103b99b031cb0ff6979331757bfc4893f37ae9e\",\"lessThan\":\"f64b437641b5a70c18bb0fd38da2b69d8926c871\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7103b99b031cb0ff6979331757bfc4893f37ae9e\",\"lessThan\":\"91e12b0fbd7047d02bf4ef4dbc491b9ef0159250\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7103b99b031cb0ff6979331757bfc4893f37ae9e\",\"lessThan\":\"2071624c3d0f497ca91da78858e6f30d7112fea6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7103b99b031cb0ff6979331757bfc4893f37ae9e\",\"lessThan\":\"30b0d44c978bbc857bd68b71dab371805653de70\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7103b99b031cb0ff6979331757bfc4893f37ae9e\",\"lessThan\":\"be61c8c6252671ecf1fee0ad90f87669e0be1e20\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/iio/chemical/atlas-sensor.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.8\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.8\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.110\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.51\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.5\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2071624c3d0f497ca91da78858e6f30d7112fea6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/30b0d44c978bbc857bd68b71dab371805653de70\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/91e12b0fbd7047d02bf4ef4dbc491b9ef0159250\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/be61c8c6252671ecf1fee0ad90f87669e0be1e20\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f64b437641b5a70c18bb0fd38da2b69d8926c871\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

FKIE_CVE-2026-89938

Vulnerability from fkie_nvd - Published: 2026-09-16 11:17 - Updated: 2026-09-16 15:18

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2071624c3d0f497ca91da78858e6f30d7112fea6
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/30b0d44c978bbc857bd68b71dab371805653de70
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/91e12b0fbd7047d02bf4ef4dbc491b9ef0159250
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/be61c8c6252671ecf1fee0ad90f87669e0be1e20
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f64b437641b5a70c18bb0fd38da2b69d8926c871

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iio/chemical/atlas-sensor.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f64b437641b5a70c18bb0fd38da2b69d8926c871",
              "status": "affected",
              "version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
              "versionType": "git"
            },
            {
              "lessThan": "91e12b0fbd7047d02bf4ef4dbc491b9ef0159250",
              "status": "affected",
              "version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
              "versionType": "git"
            },
            {
              "lessThan": "2071624c3d0f497ca91da78858e6f30d7112fea6",
              "status": "affected",
              "version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
              "versionType": "git"
            },
            {
              "lessThan": "30b0d44c978bbc857bd68b71dab371805653de70",
              "status": "affected",
              "version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
              "versionType": "git"
            },
            {
              "lessThan": "be61c8c6252671ecf1fee0ad90f87669e0be1e20",
              "status": "affected",
              "version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iio/chemical/atlas-sensor.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF\n\nThe atlas driver requests its hardware data-ready IRQ with\ndevm_request_threaded_irq(); its threaded handler queues an irq_work,\natlas_work_handler(), that calls iio_trigger_poll(data-\u003etrig).\n\nThe IRQ is devm-managed, so free_irq() runs from the devres unwind after\natlas_remove() returns without flushing that irq_work.  Once a buffer is\nenabled, conversion-complete IRQs keep firing and queueing it; a pending\nirq_work can therefore run after the unwind has freed atlas_data/indio_dev\nand the trigger, when atlas_work_handler() derives the atlas_data pointer\nvia container_of() and dereferences data-\u003etrig, a use-after-free.\n\nCall iio_trigger_poll_nested() directly from the threaded handler instead\nof bouncing through irq_work.  free_irq() then drains the threaded handler,\nclosing the window; other iio drivers with a threaded data-ready IRQ do the\nsame (e.g. bmi270).\n\nThis issue was found by an in-house static analysis tool."
    }
  ],
  "id": "CVE-2026-89938",
  "lastModified": "2026-09-16T15:18:19.210",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-16T11:17:03.323",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2071624c3d0f497ca91da78858e6f30d7112fea6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/30b0d44c978bbc857bd68b71dab371805653de70"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/91e12b0fbd7047d02bf4ef4dbc491b9ef0159250"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/be61c8c6252671ecf1fee0ad90f87669e0be1e20"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f64b437641b5a70c18bb0fd38da2b69d8926c871"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-CV98-FWW9-9MFG

Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-16 15:31

Details

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.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Show details on source website

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To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-89938"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-16T11:17:03Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF\n\nThe atlas driver requests its hardware data-ready IRQ with\ndevm_request_threaded_irq(); its threaded handler queues an irq_work,\natlas_work_handler(), that calls iio_trigger_poll(data-\u003etrig).\n\nThe IRQ is devm-managed, so free_irq() runs from the devres unwind after\natlas_remove() returns without flushing that irq_work.  Once a buffer is\nenabled, conversion-complete IRQs keep firing and queueing it; a pending\nirq_work can therefore run after the unwind has freed atlas_data/indio_dev\nand the trigger, when atlas_work_handler() derives the atlas_data pointer\nvia container_of() and dereferences data-\u003etrig, a use-after-free.\n\nCall iio_trigger_poll_nested() directly from the threaded handler instead\nof bouncing through irq_work.  free_irq() then drains the threaded handler,\nclosing the window; other iio drivers with a threaded data-ready IRQ do the\nsame (e.g. bmi270).\n\nThis issue was found by an in-house static analysis tool.",
  "id": "GHSA-cv98-fww9-9mfg",
  "modified": "2026-09-16T15:31:02Z",
  "published": "2026-09-16T12:30:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89938"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2071624c3d0f497ca91da78858e6f30d7112fea6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/30b0d44c978bbc857bd68b71dab371805653de70"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/91e12b0fbd7047d02bf4ef4dbc491b9ef0159250"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be61c8c6252671ecf1fee0ad90f87669e0be1e20"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f64b437641b5a70c18bb0fd38da2b69d8926c871"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-89938

Vulnerability from csaf_microsoft - Published: 2026-09-17 01:02 - Updated: 2026-09-17 01:02

Summary

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

Scope

1 vulnerability in this advisory, including CVE-2026-89938.

CVE-2026-89938

7.8 (High)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Known affected: 1 product

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-89938 (GCVE-0-2026-89938)

FKIE_CVE-2026-89938

GHSA-CV98-FWW9-9MFG

MSRC_CVE-2026-89938

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