CVE-2026-89892 (GCVE-0-2026-89892)
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: em28xx: defer audio-only extension registration The audio-only path registers extensions while probing the primary device. For a dual-TS board, this happens before dev_next is created. The duplicate device inherits is_audio_only and is then independently inserted into em28xx_devlist. The list is intended to contain only primary devices: extension operations reach the secondary device through dev_next. The independently linked secondary can be freed during disconnect while its list node remains reachable, resulting in a use-after-free. Defer audio-only extension registration to the module-request work item. It runs only after probing has completed construction of the optional secondary device, so only the primary is registered and extension callbacks reach the secondary through dev_next.
References
Impacted products
Vendor Product Version
Linux Linux Version: 4a089668ef22c295ed4997289cc48446c849249c
Version: 4a089668ef22c295ed4997289cc48446c849249c
Version: 4a089668ef22c295ed4997289cc48446c849249c
Version: 4a089668ef22c295ed4997289cc48446c849249c
Version: 4a089668ef22c295ed4997289cc48446c849249c
Version: 4a089668ef22c295ed4997289cc48446c849249c
Version: 4a089668ef22c295ed4997289cc48446c849249c
Version: 4a089668ef22c295ed4997289cc48446c849249c
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: em28xx: defer audio-only extension registration\n\nThe audio-only path registers extensions while probing the primary device.\nFor a dual-TS board, this happens before dev_next is created. The duplicate\ndevice inherits is_audio_only and is then independently inserted into\nem28xx_devlist.\n\nThe list is intended to contain only primary devices: extension operations\nreach the secondary device through dev_next. The independently linked\nsecondary can be freed during disconnect while its list node remains\nreachable, resulting in a use-after-free.\n\nDefer audio-only extension registration to the module-request work item. It\nruns only after probing has completed construction of the optional\nsecondary device, so only the primary is registered and extension callbacks\nreach the secondary through dev_next."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:54:25.221Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/95f76f51937fdfb0fc1e14cae606b1ef574a56f3"
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      "title": "media: em28xx: defer audio-only extension registration",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89892",
    "datePublished": "2026-09-16T10:31:54.665Z",
    "dateReserved": "2026-09-11T19:38:34.773Z",
    "dateUpdated": "2026-10-19T08:54:25.221Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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