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
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)
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)
Create a notification for this product.
Show details on NVD website
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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\",\"mat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    "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"
    }
  }
}



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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.