Vulnerability-Lookup

GHSA-R4JC-X475-GRGG

Vulnerability from github – Published: 2026-08-22 18:30 – Updated: 2026-08-22 18:30

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-74642"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T16:16:37Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-r4jc-x475-grgg",
  "modified": "2026-08-22T18:30:27Z",
  "published": "2026-08-22T18:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74642"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/422d8a02de5ce6a29d616d55e5ead5dec69ac1d7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d217d723c5e43881b952cdb978477f7f2dc0b6d7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d431941825d357be7d9ab0cb7505e3a1963bd89e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f8a80cfb68613fb7e6452b66447dbc63f435d140"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f9d492a39ebeb1a56f13ec6dd165a18a48dec812"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-08-22 15:32 – Updated: 2026-08-22 15:32

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 mitre root

References

5 references

URL	Tags
https://git.kernel.org/stable/c/d431941825d357be7…
https://git.kernel.org/stable/c/422d8a02de5ce6a29…
https://git.kernel.org/stable/c/d217d723c5e43881b…
https://git.kernel.org/stable/c/f9d492a39ebeb1a56…
https://git.kernel.org/stable/c/f8a80cfb68613fb7e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 49eccef6d6e1c00dac6fb2e7eb6f9206c33e1c37 , < d431941825d357be7d9ab0cb7505e3a1963bd89e (git) Affected: 8a7a33b846d6ba695891b8d0040027cdbad8cd52 , < 422d8a02de5ce6a29d616d55e5ead5dec69ac1d7 (git) Affected: cc014ebf803174f0e5d15956dfc5a38413c945ae , < d217d723c5e43881b952cdb978477f7f2dc0b6d7 (git) Affected: ae388c0e1bf727972096f770f82d12e4f748d1b6 , < f9d492a39ebeb1a56f13ec6dd165a18a48dec812 (git) Affected: 4a05b2d1b4642df74f30b6f54843e825c4a2bfd3 , < f8a80cfb68613fb7e6452b66447dbc63f435d140 (git)
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": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/usb/midi2.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d431941825d357be7d9ab0cb7505e3a1963bd89e",
              "status": "affected",
              "version": "49eccef6d6e1c00dac6fb2e7eb6f9206c33e1c37",
              "versionType": "git"
            },
            {
              "lessThan": "422d8a02de5ce6a29d616d55e5ead5dec69ac1d7",
              "status": "affected",
              "version": "8a7a33b846d6ba695891b8d0040027cdbad8cd52",
              "versionType": "git"
            },
            {
              "lessThan": "d217d723c5e43881b952cdb978477f7f2dc0b6d7",
              "status": "affected",
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              "versionType": "git"
            },
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              "versionType": "git"
            },
            {
              "lessThan": "f8a80cfb68613fb7e6452b66447dbc63f435d140",
              "status": "affected",
              "version": "4a05b2d1b4642df74f30b6f54843e825c4a2bfd3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/usb/midi2.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "6.6.152",
              "status": "affected",
              "version": "6.6.151",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.104",
              "status": "affected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18.45",
              "status": "affected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThan": "7.1.9",
              "status": "affected",
              "version": "7.1.8",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.152",
                  "versionStartIncluding": "6.6.151",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.12.103",
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                },
                {
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                }
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              "negate": false,
              "operator": "OR"
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      "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",
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        {
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        "engine": "bippy-1.2.0"
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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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-R4JC-X475-GRGG

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

Tags

Sightings

Nomenclature