FKIE_CVE-2026-68346

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-17 06:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: hda: cs35l41: validate and free ACPI mute object cs35l41_get_acpi_mute_state() evaluates a _DSM method to get the ACPI mute state and reads the first byte from the returned object. However, the returned ACPI object is owned by the caller and is never freed after use, so each successful query leaks the _DSM result object. The code also assumes that the returned object is a buffer with at least one byte. A malformed firmware response can return a different object type or an empty buffer, and the direct ret->buffer.pointer dereference can then access an invalid pointer. Use the typed _DSM helper, validate that the returned buffer contains at least one byte, and free the ACPI object after reading it.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/08433c71f15984ddd5f5a307cf3f0aa9b84583aa
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3b597d24dc0455ae926f1053f97c2725038fc3cd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7fea0c89ed39a13d9a31163a74f8c62de30a4ffc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d5dfdf43259ad9d054052012095b1630e7366dcf
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/hda/codecs/side-codecs/cs35l41_hda.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7fea0c89ed39a13d9a31163a74f8c62de30a4ffc",
              "status": "affected",
              "version": "447106e92a0c86c332d40710436f38f64c322cd6",
              "versionType": "git"
            },
            {
              "lessThan": "08433c71f15984ddd5f5a307cf3f0aa9b84583aa",
              "status": "affected",
              "version": "447106e92a0c86c332d40710436f38f64c322cd6",
              "versionType": "git"
            },
            {
              "lessThan": "d5dfdf43259ad9d054052012095b1630e7366dcf",
              "status": "affected",
              "version": "447106e92a0c86c332d40710436f38f64c322cd6",
              "versionType": "git"
            },
            {
              "lessThan": "3b597d24dc0455ae926f1053f97c2725038fc3cd",
              "status": "affected",
              "version": "447106e92a0c86c332d40710436f38f64c322cd6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "sound/hda/codecs/side-codecs/cs35l41_hda.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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\nALSA: hda: cs35l41: validate and free ACPI mute object\n\ncs35l41_get_acpi_mute_state() evaluates a _DSM method to get the ACPI\nmute state and reads the first byte from the returned object.\n\nHowever, the returned ACPI object is owned by the caller and is never\nfreed after use, so each successful query leaks the _DSM result object.\n\nThe code also assumes that the returned object is a buffer with at least\none byte. A malformed firmware response can return a different object\ntype or an empty buffer, and the direct ret-\u003ebuffer.pointer dereference\ncan then access an invalid pointer.\n\nUse the typed _DSM helper, validate that the returned buffer contains at\nleast one byte, and free the ACPI object after reading it."
    }
  ],
  "id": "CVE-2026-68346",
  "lastModified": "2026-08-17T06:17:42.827",
  "metrics": {},
  "published": "2026-08-10T13:20:25.207",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/08433c71f15984ddd5f5a307cf3f0aa9b84583aa"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3b597d24dc0455ae926f1053f97c2725038fc3cd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7fea0c89ed39a13d9a31163a74f8c62de30a4ffc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d5dfdf43259ad9d054052012095b1630e7366dcf"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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