FKIE_CVE-2026-23158

Vulnerability from fkie_nvd - Published: 2026-02-14 16:15 - Updated: 2026-06-17 10:21
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/53ad4a948a4586359b841d607c08fb16c5503230Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7bec90f605cfb138006f5ba575f2310593347110Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/815a8e3bf72811d402b30bd4a53cde5e9df7a563Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpio/gpio-virtuser.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "815a8e3bf72811d402b30bd4a53cde5e9df7a563",
              "status": "affected",
              "version": "91581c4b3f29e2e22aeb1a62e842d529ca638b2d",
              "versionType": "git"
            },
            {
              "lessThan": "7bec90f605cfb138006f5ba575f2310593347110",
              "status": "affected",
              "version": "91581c4b3f29e2e22aeb1a62e842d529ca638b2d",
              "versionType": "git"
            },
            {
              "lessThan": "53ad4a948a4586359b841d607c08fb16c5503230",
              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpio/gpio-virtuser.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.69",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
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              "versionEndExcluding": "6.12.69",
              "versionStartIncluding": "6.11",
              "vulnerable": true
            },
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          "negate": false,
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: virtuser: fix UAF in configfs release path\n\nThe gpio-virtuser configfs release path uses guard(mutex) to protect\nthe device structure. However, the device is freed before the guard\ncleanup runs, causing mutex_unlock() to operate on freed memory.\n\nSpecifically, gpio_virtuser_device_config_group_release() destroys\nthe mutex and frees the device while still inside the guard(mutex)\nscope. When the function returns, the guard cleanup invokes\nmutex_unlock(\u0026dev-\u003elock), resulting in a slab use-after-free.\n\nLimit the mutex lifetime by using a scoped_guard() only around the\nactivation check, so that the lock is released before mutex_destroy()\nand kfree() are called."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ngpio: virtuser: corregir uso despu\u00e9s de liberaci\u00f3n en la ruta de liberaci\u00f3n de configfs\n\nLa ruta de liberaci\u00f3n de configfs de gpio-virtuser usa guard(mutex) para proteger la estructura del dispositivo. Sin embargo, el dispositivo es liberado antes de que se ejecute la limpieza del guard, causando que mutex_unlock() opere sobre memoria liberada.\n\nEspec\u00edficamente, gpio_virtuser_device_config_group_release() destruye el mutex y libera el dispositivo mientras a\u00fan est\u00e1 dentro del \u00e1mbito de guard(mutex). Cuando la funci\u00f3n retorna, la limpieza del guard invoca mutex_unlock(\u0026amp;dev-\u0026gt;lock), resultando en un uso despu\u00e9s de liberaci\u00f3n de slab.\n\nLimitar la vida \u00fatil del mutex usando un scoped_guard() solo alrededor de la verificaci\u00f3n de activaci\u00f3n, para que el bloqueo sea liberado antes de que se llamen a mutex_destroy() y kfree()."
    }
  ],
  "id": "CVE-2026-23158",
  "lastModified": "2026-06-17T10:21:00.450",
  "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": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-02-14T16:15:55.967",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/53ad4a948a4586359b841d607c08fb16c5503230"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/7bec90f605cfb138006f5ba575f2310593347110"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/815a8e3bf72811d402b30bd4a53cde5e9df7a563"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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