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CVE-2026-52963 (GCVE-0-2026-52963)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:28 – Updated: 2026-06-24 16:28
VLAI
Title
ALSA: usb-audio: Bound MIDI endpoint descriptor scans
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Bound MIDI endpoint descriptor scans snd_usbmidi_get_ms_info() validates the internal MIDIStreaming endpoint descriptor size before using baAssocJackID[], but the descriptor walker can still return a class-specific endpoint descriptor whose bLength exceeds the remaining bytes in the endpoint-extra scan. That leaves later flexible-array reads bounded by bLength, but not by the remaining bytes in the endpoint-extra scan. Stop walking when bLength is zero or extends past the remaining endpoint-extra scan.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5c6cd7021a05a02fcf37f360592d7c18d4d807fb , < e2f1260a056eb3215c13c48c5378f3e4112dc3af (git)
Affected: 5c6cd7021a05a02fcf37f360592d7c18d4d807fb , < c65b137d351e21cbc5630e73ef0eb1e1d75f5b20 (git)
Affected: 5c6cd7021a05a02fcf37f360592d7c18d4d807fb , < 728ab0c72e49ca27185067984cd565425eb69b2e (git)
Affected: 5c6cd7021a05a02fcf37f360592d7c18d4d807fb , < 3d3b2b01a3e73828e201ece96f863e7a3e0cdc6e (git)
Affected: 5c6cd7021a05a02fcf37f360592d7c18d4d807fb , < a0226560540c16717efcceaf15c862cf115b01d3 (git)
Affected: 5c6cd7021a05a02fcf37f360592d7c18d4d807fb , < 09141583bd97f4bbd7358e29fd138fe798467cdb (git)
Affected: 5c6cd7021a05a02fcf37f360592d7c18d4d807fb , < c59159ce10e75b568cd0d4b29efcb0fb0ddecc94 (git)
Affected: 5c6cd7021a05a02fcf37f360592d7c18d4d807fb , < d6854daa67be623860f4e1873fd3d3c275aba4ed (git)
Affected: 9e0c71f2f633b0442661966228827d1a33df485f (git)
Affected: 0868bc5654c07628c421547f0821650a8c2cb8f3 (git)
Affected: 78483c1c7741ffa72991d93d19a75bfdcc2cbf57 (git)
Affected: 65d95462001c6ccd9bc9499c1fc9a90eca9de496 (git)
Affected: ca767cf0152d18fc299cde85b18d1f46ac21e1ba (git)
Affected: 4.4.238 , < 4.5 (semver)
Affected: 4.9.238 , < 4.10 (semver)
Affected: 4.14.200 , < 4.15 (semver)
Affected: 4.19.149 , < 4.20 (semver)
Affected: 5.4.69 , < 5.5 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-52963\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-24T17:17:06.650\",\"lastModified\":\"2026-07-14T16:17:50.187\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nALSA: usb-audio: Bound MIDI endpoint descriptor scans\\n\\nsnd_usbmidi_get_ms_info() validates the internal MIDIStreaming endpoint\\ndescriptor size before using baAssocJackID[], but the descriptor walker can\\nstill return a class-specific endpoint descriptor whose bLength exceeds the\\nremaining bytes in the endpoint-extra scan.\\n\\nThat leaves later flexible-array reads bounded by bLength, but not by the\\nremaining bytes in the endpoint-extra scan.\\n\\nStop walking when bLength is zero or\\nextends past the remaining endpoint-extra scan.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"sound/usb/midi.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5c6cd7021a05a02fcf37f360592d7c18d4d807fb\",\"lessThan\":\"e2f1260a056eb3215c13c48c5378f3e4112dc3af\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5c6cd7021a05a02fcf37f360592d7c18d4d807fb\",\"lessThan\":\"c65b137d351e21cbc5630e73ef0eb1e1d75f5b20\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5c6cd7021a05a02fcf37f360592d7c18d4d807fb\",\"lessThan\":\"728ab0c72e49ca27185067984cd565425eb69b2e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5c6cd7021a05a02fcf37f360592d7c18d4d807fb\",\"lessThan\":\"3d3b2b01a3e73828e201ece96f863e7a3e0cdc6e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5c6cd7021a05a02fcf37f360592d7c18d4d807fb\",\"lessThan\":\"a0226560540c16717efcceaf15c862cf115b01d3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5c6cd7021a05a02fcf37f360592d7c18d4d807fb\",\"lessThan\":\"09141583bd97f4bbd7358e29fd138fe798467cdb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5c6cd7021a05a02fcf37f360592d7c18d4d807fb\",\"lessThan\":\"c59159ce10e75b568cd0d4b29efcb0fb0ddecc94\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5c6cd7021a05a02fcf37f360592d7c18d4d807fb\",\"lessThan\":\"d6854daa67be623860f4e1873fd3d3c275aba4ed\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9e0c71f2f633b0442661966228827d1a33df485f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0868bc5654c07628c421547f0821650a8c2cb8f3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"78483c1c7741ffa72991d93d19a75bfdcc2cbf57\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"65d95462001c6ccd9bc9499c1fc9a90eca9de496\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ca767cf0152d18fc299cde85b18d1f46ac21e1ba\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4.4.238\",\"lessThan\":\"4.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.9.238\",\"lessThan\":\"4.10\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.14.200\",\"lessThan\":\"4.15\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.149\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.69\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"sound/usb/midi.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.258\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.141\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.91\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.33\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.10\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.4.238\",\"versionEndExcluding\":\"4.5\",\"matchCriteriaId\":\"06D736F2-3AF9-405C-A2D4-D7A433966CD1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.9.238\",\"versionEndExcluding\":\"4.10\",\"matchCriteriaId\":\"C239C4E4-A9BE-4BA4-B0ED-58C96D32A965\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.14.200\",\"versionEndExcluding\":\"4.15\",\"matchCriteriaId\":\"E4C219D0-2F4C-4842-85C7-5EE4D0099F82\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.19.149\",\"versionEndExcluding\":\"4.20\",\"matchCriteriaId\":\"22D98FED-AEF1-4722-8A24-E84AEFBAE267\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4.69\",\"versionEndExcluding\":\"5.5\",\"matchCriteriaId\":\"20BCB29D-C30A-4880-8FC2-2468E283C95D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.7\",\"versionEndExcluding\":\"5.10.258\",\"matchCriteriaId\":\"33983DD1-6F5C-4A20-A9AF-24DABFA46B60\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.209\",\"matchCriteriaId\":\"919C10A9-7951-4A74-BADD-C135A0A8D8B4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.175\",\"matchCriteriaId\":\"92385813-D91D-480D-83A1-F423D2CBB2BA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.141\",\"matchCriteriaId\":\"97A9FFFA-22BB-4D5C-9790-5A2286E392F7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.91\",\"matchCriteriaId\":\"C918746B-DE6F-448F-A93E-A04C5481688D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.33\",\"matchCriteriaId\":\"96D99E49-380D-43AB-BDBA-25C3AD018A9C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"7.0.10\",\"matchCriteriaId\":\"A13475D2-59BF-4716-94B5-7C1D239A2CF4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B1EF7059-E670-45F4-B422-54C40FA86390\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"0D38F0BF-A728-4133-A358-D44A2F7EE6D6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"EC732D08-5F7B-46D9-B154-E60C7F4F0A97\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/09141583bd97f4bbd7358e29fd138fe798467cdb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3d3b2b01a3e73828e201ece96f863e7a3e0cdc6e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/728ab0c72e49ca27185067984cd565425eb69b2e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a0226560540c16717efcceaf15c862cf115b01d3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c59159ce10e75b568cd0d4b29efcb0fb0ddecc94\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c65b137d351e21cbc5630e73ef0eb1e1d75f5b20\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d6854daa67be623860f4e1873fd3d3c275aba4ed\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e2f1260a056eb3215c13c48c5378f3e4112dc3af\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-14T16:28:35+00:00",
      "cve": "CVE-2026-52963",
      "id": "CVE-2026-52963",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:known_affected": "246",
      "product_status:known_not_affected": "28",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ALSA: usb-audio: Bound MIDI endpoint descriptor scans",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52963.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T16:47:25Z",
      "cve": "CVE-2026-52963",
      "id": "CVE-2026-52963",
      "initial_release_date": "2026-06-26T02:14:35Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "611",
      "product_status:known_not_affected": "63",
      "product_status:recommended": "250",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-52963",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-52963.json",
      "version": "10"
    }
  }
}



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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

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.