gpio: virtuser: fix UAF in configfs release path

{
  "id": "09ce25dabbc69d3c778307d25c7ead0110511181c9d55fb74509b4aad50c47b6",
  "url": "https://osv.dev/vulnerability/CVE-2026-23158",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "gpio: virtuser: fix UAF in configfs release path",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: gpio: virtuser: fix UAF in configfs release path The gpio-virtuser configfs release path uses guard(mutex) to protect the device structure. However, the device is freed before the guard cleanup runs, causing mutex_unlock() to operate on freed memory. Specifically, gpio_virtuser_device_config_group_release() destroys the mutex and frees the device while still inside the guard(mutex) scope. When the function returns, the guard cleanup invokes mutex_unlock(&dev->lock), resulting in a slab use-after-free. Limit the mutex lifetime by using a scoped_guard() only around the activation check, so that the lock is released before mutex_destroy() and kfree() are called.",
    "evidence": "osv:CVE-2026-23158",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.69",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-23158",
      "aliases": [
        "CVE-2026-23158"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "91581c4b3f29e2e22aeb1a62e842d529ca638b2d"
                },
                {
                  "fixed": "815a8e3bf72811d402b30bd4a53cde5e9df7a563"
                },
                {
                  "fixed": "7bec90f605cfb138006f5ba575f2310593347110"
                },
                {
                  "fixed": "53ad4a948a4586359b841d607c08fb16c5503230"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23158.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.11.0"
                },
                {
                  "fixed": "6.12.69"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.9"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23158.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:28.024749053Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/53ad4a948a4586359b841d607c08fb16c5503230",
        "https://git.kernel.org/stable/c/7bec90f605cfb138006f5ba575f2310593347110",
        "https://git.kernel.org/stable/c/815a8e3bf72811d402b30bd4a53cde5e9df7a563",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23158.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-23158",
        "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/2026/23xxx/CVE-2026-23158.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-23158",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 494618,
  "published_at": "2026-02-14T16:01:24.568+00:00"
}