media: cobalt: Avoid freeing ALSA private data twice

{
  "id": "50db7ac5564a0ef4222b156abd1cc3c31b994f44b3650e25af25d70af545a17b",
  "url": "https://osv.dev/vulnerability/CVE-2026-89895",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "media: cobalt: Avoid freeing ALSA private data twice",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: media: cobalt: Avoid freeing ALSA private data twice snd_cobalt_card_create() stores cobsc in sc->private_data and installs snd_cobalt_card_private_free() as sc->private_free. From that point, snd_card_free(sc) releases cobsc through the ALSA card cleanup path. If cobalt_alsa_init() fails after snd_cobalt_card_create(), the err_exit_free path calls snd_card_free(sc) and then kfree(cobsc). That second free releases the same object again. Remove the explicit kfree(cobsc) and leave ownership with the ALSA card. This issue was found by a static analysis checker and confirmed by manual source review.",
    "evidence": "osv:CVE-2026-89895",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "5.10.270",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.221",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.188",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.157",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.110",
            "evidence": "/affected/1/ranges"
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          {
            "value": "6.18.51",
            "evidence": "/affected/1/ranges"
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          {
            "value": "7.2.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-89895",
      "aliases": [
        "CVE-2026-89895"
      ],
      "affected": [
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              "type": "GIT",
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                {
                  "fixed": "61dfa8ded5efc3a25d331fa9ce5cebb85531fe70"
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                {
                  "fixed": "42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8"
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                {
                  "fixed": "6cbc8a73b3464ebeccc49987b7233b6b087b8504"
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                {
                  "fixed": "cb1218da234ea15fa14d90e2d049d686874d7aa3"
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                {
                  "fixed": "8c6610e230b9355cf7df5a338a0592c0f088c00b"
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          }
        },
        {
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              "type": "ECOSYSTEM",
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                  "introduced": "4.2.0"
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
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        }
      ],
      "modified": "2026-10-28T02:30:24.968768003Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1",
        "https://git.kernel.org/stable/c/42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8",
        "https://git.kernel.org/stable/c/61dfa8ded5efc3a25d331fa9ce5cebb85531fe70",
        "https://git.kernel.org/stable/c/6cbc8a73b3464ebeccc49987b7233b6b087b8504",
        "https://git.kernel.org/stable/c/75bbf45e3a954e292ae26832d2df40ca2e3ee452",
        "https://git.kernel.org/stable/c/8c6610e230b9355cf7df5a338a0592c0f088c00b",
        "https://git.kernel.org/stable/c/cb1218da234ea15fa14d90e2d049d686874d7aa3",
        "https://git.kernel.org/stable/c/fe65028ee72a7e07e572b351891bd7a1f8917d33",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89895.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-89895",
        "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/2026/89xxx/CVE-2026-89895.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-89895",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 491641,
  "published_at": "2026-09-16T10:31:56.817+00:00"
}