FKIE_CVE-2026-90032

Vulnerability from fkie_nvd - Published: 2026-09-16 11:17 - Updated: 2026-10-19 09:18
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: media: usbtv: keep device alive while ALSA card exists The ALSA PCM callbacks store the driver state in pcm->private_data. An open PCM file can outlive USB disconnect because usbtv_audio_free() uses snd_card_free_when_closed(). The disconnect path can then drop the V4L2 device reference and free struct usbtv before ALSA releases the substream, so a later close dereferences freed memory in snd_usbtv_pcm_close(). Take a V4L2 device reference for the ALSA card and drop it from the card private_free callback. This keeps struct usbtv valid until ALSA has closed the remaining files and freed the card.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1618257cb0aba4ce342ae8c0228368c24161f5fb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/239d1683e08b2aee2a15ef35706e1ea9a76681d8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/503be26ff888cb3576e55d251895d290e8146f27
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/67374e3a00814dcdd46e9feca61f69f7f2d81957
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7690a86b193271322cd31ab77349a87aa10858e4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/97b5e8b22b98e287481a97a9a4cfebbb348738a5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/be0f7745f883386e5263b4e475686a81dfa87175
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fc530fe168bb2b745a93f553ad21fc25fd9cba3d
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/usb/usbtv/usbtv-audio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "97b5e8b22b98e287481a97a9a4cfebbb348738a5",
              "status": "affected",
              "version": "63ddf68de52efaac40a9287e44266ac30e71dd36",
              "versionType": "git"
            },
            {
              "lessThan": "503be26ff888cb3576e55d251895d290e8146f27",
              "status": "affected",
              "version": "63ddf68de52efaac40a9287e44266ac30e71dd36",
              "versionType": "git"
            },
            {
              "lessThan": "be0f7745f883386e5263b4e475686a81dfa87175",
              "status": "affected",
              "version": "63ddf68de52efaac40a9287e44266ac30e71dd36",
              "versionType": "git"
            },
            {
              "lessThan": "67374e3a00814dcdd46e9feca61f69f7f2d81957",
              "status": "affected",
              "version": "63ddf68de52efaac40a9287e44266ac30e71dd36",
              "versionType": "git"
            },
            {
              "lessThan": "239d1683e08b2aee2a15ef35706e1ea9a76681d8",
              "status": "affected",
              "version": "63ddf68de52efaac40a9287e44266ac30e71dd36",
              "versionType": "git"
            },
            {
              "lessThan": "7690a86b193271322cd31ab77349a87aa10858e4",
              "status": "affected",
              "version": "63ddf68de52efaac40a9287e44266ac30e71dd36",
              "versionType": "git"
            },
            {
              "lessThan": "1618257cb0aba4ce342ae8c0228368c24161f5fb",
              "status": "affected",
              "version": "63ddf68de52efaac40a9287e44266ac30e71dd36",
              "versionType": "git"
            },
            {
              "lessThan": "fc530fe168bb2b745a93f553ad21fc25fd9cba3d",
              "status": "affected",
              "version": "63ddf68de52efaac40a9287e44266ac30e71dd36",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/usb/usbtv/usbtv-audio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.18"
            },
            {
              "lessThan": "3.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "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\nmedia: usbtv: keep device alive while ALSA card exists\n\nThe ALSA PCM callbacks store the driver state in pcm-\u003eprivate_data. An\nopen PCM file can outlive USB disconnect because usbtv_audio_free() uses\nsnd_card_free_when_closed(). The disconnect path can then drop the V4L2\ndevice reference and free struct usbtv before ALSA releases the substream,\nso a later close dereferences freed memory in snd_usbtv_pcm_close().\n\nTake a V4L2 device reference for the ALSA card and drop it from the card\nprivate_free callback. This keeps struct usbtv valid until ALSA has closed\nthe remaining files and freed the card."
    }
  ],
  "id": "CVE-2026-90032",
  "lastModified": "2026-10-19T09:18:51.353",
  "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": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-16T11:17:16.310",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1618257cb0aba4ce342ae8c0228368c24161f5fb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/239d1683e08b2aee2a15ef35706e1ea9a76681d8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/503be26ff888cb3576e55d251895d290e8146f27"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/67374e3a00814dcdd46e9feca61f69f7f2d81957"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7690a86b193271322cd31ab77349a87aa10858e4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/97b5e8b22b98e287481a97a9a4cfebbb348738a5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/be0f7745f883386e5263b4e475686a81dfa87175"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fc530fe168bb2b745a93f553ad21fc25fd9cba3d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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