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
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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      "affected": [
        {
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          "product": "Linux",
          "programFiles": [
            "sound/usb/midi2.c"
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      "cpeApplicability": [
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-22T15:32:20.418Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/d431941825d357be7d9ab0cb7505e3a1963bd89e"
        },
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          "url": "https://git.kernel.org/stable/c/422d8a02de5ce6a29d616d55e5ead5dec69ac1d7"
        },
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          "url": "https://git.kernel.org/stable/c/d217d723c5e43881b952cdb978477f7f2dc0b6d7"
        },
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          "url": "https://git.kernel.org/stable/c/f9d492a39ebeb1a56f13ec6dd165a18a48dec812"
        },
        {
          "url": "https://git.kernel.org/stable/c/f8a80cfb68613fb7e6452b66447dbc63f435d140"
        }
      ],
      "title": "ALSA: usb: Fix UAF at delayed release of MIDI2 EPs",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-09-01",
      "epss": "0.00168",
      "percentile": "0.0632"
    },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-24T13:32:04+00:00",
      "cve": "CVE-2026-74642",
      "id": "CVE-2026-74642",
      "initial_release_date": "2026-08-22T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "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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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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