CVE-2026-89895 (GCVE-0-2026-89895)
Vulnerability from cvelistv5
Published
2026-09-16 10:31
Modified
2026-10-19 08:54
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 85756a069c55e0315ac5990806899cfb607b987f
Version: 85756a069c55e0315ac5990806899cfb607b987f
Version: 85756a069c55e0315ac5990806899cfb607b987f
Version: 85756a069c55e0315ac5990806899cfb607b987f
Version: 85756a069c55e0315ac5990806899cfb607b987f
Version: 85756a069c55e0315ac5990806899cfb607b987f
Version: 85756a069c55e0315ac5990806899cfb607b987f
Version: 85756a069c55e0315ac5990806899cfb607b987f
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/pci/cobalt/cobalt-alsa-main.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "version": "4.2"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.10.270",
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            },
            {
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              "status": "unaffected",
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            },
            {
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              "status": "unaffected",
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              "versionType": "semver"
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              "status": "unaffected",
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              "lessThanOrEqual": "6.12.*",
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              "lessThanOrEqual": "*",
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              "version": "7.3",
              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cobalt: Avoid freeing ALSA private data twice\n\nsnd_cobalt_card_create() stores cobsc in sc-\u003eprivate_data and installs\nsnd_cobalt_card_private_free() as sc-\u003eprivate_free. From that point,\nsnd_card_free(sc) releases cobsc through the ALSA card cleanup path.\n\nIf cobalt_alsa_init() fails after snd_cobalt_card_create(), the\nerr_exit_free path calls snd_card_free(sc) and then kfree(cobsc). That\nsecond free releases the same object again.\n\nRemove the explicit kfree(cobsc) and leave ownership with the ALSA card.\n\nThis issue was found by a static analysis checker and confirmed by\nmanual source review."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:54:28.227Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/75bbf45e3a954e292ae26832d2df40ca2e3ee452"
        },
        {
          "url": "https://git.kernel.org/stable/c/fe65028ee72a7e07e572b351891bd7a1f8917d33"
        },
        {
          "url": "https://git.kernel.org/stable/c/61dfa8ded5efc3a25d331fa9ce5cebb85531fe70"
        },
        {
          "url": "https://git.kernel.org/stable/c/42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8"
        },
        {
          "url": "https://git.kernel.org/stable/c/6cbc8a73b3464ebeccc49987b7233b6b087b8504"
        },
        {
          "url": "https://git.kernel.org/stable/c/cb1218da234ea15fa14d90e2d049d686874d7aa3"
        },
        {
          "url": "https://git.kernel.org/stable/c/8c6610e230b9355cf7df5a338a0592c0f088c00b"
        },
        {
          "url": "https://git.kernel.org/stable/c/3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1"
        }
      ],
      "title": "media: cobalt: Avoid freeing ALSA private data twice",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89895",
    "datePublished": "2026-09-16T10:31:56.817Z",
    "dateReserved": "2026-09-11T19:38:34.773Z",
    "dateUpdated": "2026-10-19T08:54:28.227Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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