CVE-2026-74642 (GCVE-0-2026-74642)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:32 – Updated: 2026-08-22 15:32
VLAI
Title
ALSA: usb: Fix UAF at delayed release of MIDI2 EPs
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb: Fix UAF at delayed release of MIDI2 EPs The recent fix for UAF in ump_to_endpoint() caused another UAF because it tries to dereference the UMP endpoint object, but this might be executed at a delayed context where the endpoint has been already released. Add private_free to clear the associated data for avoiding the further dereference for delayed releases.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6666 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 49eccef6d6e1c00dac6fb2e7eb6f9206c33e1c37 , < d431941825d357be7d9ab0cb7505e3a1963bd89e (git)
Affected: 8a7a33b846d6ba695891b8d0040027cdbad8cd52 , < 422d8a02de5ce6a29d616d55e5ead5dec69ac1d7 (git)
Affected: cc014ebf803174f0e5d15956dfc5a38413c945ae , < d217d723c5e43881b952cdb978477f7f2dc0b6d7 (git)
Affected: ae388c0e1bf727972096f770f82d12e4f748d1b6 , < f9d492a39ebeb1a56f13ec6dd165a18a48dec812 (git)
Affected: 4a05b2d1b4642df74f30b6f54843e825c4a2bfd3 , < f8a80cfb68613fb7e6452b66447dbc63f435d140 (git)
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Linux Linux Affected: 6.6.151 , < 6.6.152 (semver)
Affected: 6.12.103 , < 6.12.104 (semver)
Affected: 6.18.44 , < 6.18.45 (semver)
Affected: 7.1.8 , < 7.1.9 (semver)
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "sound/usb/midi2.c"
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              "operator": "OR"
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      ],
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb: Fix UAF at delayed release of MIDI2 EPs\n\nThe recent fix for UAF in ump_to_endpoint() caused another UAF because\nit tries to dereference the UMP endpoint object, but this might be\nexecuted at a delayed context where the endpoint has been already\nreleased.\n\nAdd private_free to clear the associated data for avoiding the further\ndereference for delayed releases."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-22T15:32:20.418Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/f8a80cfb68613fb7e6452b66447dbc63f435d140"
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      "title": "ALSA: usb: Fix UAF at delayed release of MIDI2 EPs",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74642",
    "datePublished": "2026-08-22T15:32:20.418Z",
    "dateReserved": "2026-08-15T05:44:03.922Z",
    "dateUpdated": "2026-08-22T15:32:20.418Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-10-16",
      "epss": "0.00168",
      "percentile": "0.05665"
    },
    "nvd": {
      "cve": {
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                "programFiles": [
                  "sound/usb/midi2.c"
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb: Fix UAF at delayed release of MIDI2 EPs\n\nThe recent fix for UAF in ump_to_endpoint() caused another UAF because\nit tries to dereference the UMP endpoint object, but this might be\nexecuted at a delayed context where the endpoint has been already\nreleased.\n\nAdd private_free to clear the associated data for avoiding the further\ndereference for delayed releases."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nALSA: usb: Correcci\u00f3n de UAF en la liberaci\u00f3n retrasada de los EPs MIDI2\n\nLa reciente correcci\u00f3n para UAF en ump_to_endpoint() caus\u00f3 otra UAF porque intenta desreferenciar el objeto de punto final UMP, pero esto podr\u00eda ejecutarse en un contexto retrasado donde el punto final ya ha sido liberado.\n\nA\u00f1adir private_free para limpiar los datos asociados y evitar la desreferencia posterior en liberaciones retrasadas."
          }
        ],
        "id": "CVE-2026-74642",
        "lastModified": "2026-10-14T13:10:00.187",
        "metrics": {},
        "published": "2026-08-22T16:16:37.513",
        "references": [
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ALSA: usb: Fix UAF at delayed release of MIDI2 EPs",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74642.json",
      "version": "3"
    }
  }
}



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