UnratedFix available

pinctrl: mediatek: free EINT resources on unbind

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: pinctrl: mediatek: free EINT resources on unbind mtk_eint_do_init() creates an IRQ domain, populates it with a mapping for every EINT line and installs a chained handler on the parent interrupt, but none of these are ever released. This was harmless while the drivers were built-in, but now that they can be built as modules and unbound/rmmod'd it leaves behind a dangling IRQ domain, interrupt mappings whose chip data points at freed memory, and a chained handler that keeps firing into that freed data. The plain allocations in mtk_eint_do_init() already use the device-managed devm_*() helpers, so tear the remaining resources down the same way: register a devm action that detaches the chained handler, waits for any in-flight handler to finish, disposes of the per-line mappings and removes the IRQ domain. This mirrors the device-managed lifecycle adopted for the GPIO chip and keeps the whole EINT setup self-cleaning on unbind.

Products: Kernel
Affected versions: Not specified
Fixed versions: 6.1.188, 6.12.110, 6.18.52, 6.6.157, 7.2.6
CVEs: CVE-2026-92481
Confirmed fixed CVEs: Not specified
Updated in this feed: 4 Nov 2026, 18:45 UTC · Revision 1

Source evidence

pinctrl: mediatek: free EINT resources on unbind

core-osv · Original source

Published 17 Sept 2026, 16:09 UTC

osv:CVE-2026-92481

Kernel

Fixed versions: 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6

Complete source record

{
  "id": "0edc1bdc2a5d85751c850ba6eff793a4a829acc6b7ba566056c812b0fefed310",
  "url": "https://osv.dev/vulnerability/CVE-2026-92481",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "pinctrl: mediatek: free EINT resources on unbind",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: pinctrl: mediatek: free EINT resources on unbind mtk_eint_do_init() creates an IRQ domain, populates it with a mapping for every EINT line and installs a chained handler on the parent interrupt, but none of these are ever released. This was harmless while the drivers were built-in, but now that they can be built as modules and unbound/rmmod'd it leaves behind a dangling IRQ domain, interrupt mappings whose chip data points at freed memory, and a chained handler that keeps firing into that freed data. The plain allocations in mtk_eint_do_init() already use the device-managed devm_*() helpers, so tear the remaining resources down the same way: register a devm action that detaches the chained handler, waits for any in-flight handler to finish, disposes of the per-line mappings and removes the IRQ domain. This mirrors the device-managed lifecycle adopted for the GPIO chip and keeps the whole EINT setup self-cleaning on unbind.",
    "evidence": "osv:CVE-2026-92481",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "6.1.188",
            "evidence": "/affected/1/ranges"
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            "value": "6.6.157",
            "evidence": "/affected/1/ranges"
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          }
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    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-92481",
      "aliases": [
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      "affected": [
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                  "introduced": "6.19.0"
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92481.json"
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        }
      ],
      "modified": "2026-10-28T02:30:38.311753970Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/23252bc1cd9a58a039c9b1ae77b22d2b33da48e9",
        "https://git.kernel.org/stable/c/51552c8c60d3b1fecc062eab2d8cfeaa1cb339dd",
        "https://git.kernel.org/stable/c/7f6d898179ca4771ee602bdad4246c3952af83eb",
        "https://git.kernel.org/stable/c/88292b7103d260e3e606eb3bb2794060a5fde48e",
        "https://git.kernel.org/stable/c/903a7cdf63a81d3738594c5bd1b5955f58fda427",
        "https://git.kernel.org/stable/c/e06785cba7f86d72abd531058b1a82d6952a7346",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92481.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-92481",
        "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/2026/92xxx/CVE-2026-92481.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-92481",
        "evidence": "/id"
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    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 505823,
  "published_at": "2026-09-17T16:09:58.378+00:00"
}