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CVE-2026-23208 (GCVE-0-2026-23208)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:27 – Updated: 2026-05-23 16:04
VLAI
Title
ALSA: usb-audio: Prevent excessive number of frames
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Prevent excessive number of frames In this case, the user constructed the parameters with maxpacksize 40 for rate 22050 / pps 1000, and packsize[0] 22 packsize[1] 23. The buffer size for each data URB is maxpacksize * packets, which in this example is 40 * 6 = 240; When the user performs a write operation to send audio data into the ALSA PCM playback stream, the calculated number of frames is packsize[0] * packets = 264, which exceeds the allocated URB buffer size, triggering the out-of-bounds (OOB) issue reported by syzbot [1]. Added a check for the number of single data URB frames when calculating the number of frames to prevent [1]. [1] BUG: KASAN: slab-out-of-bounds in copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487 Write of size 264 at addr ffff88804337e800 by task syz.0.17/5506 Call Trace: copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487 prepare_playback_urb+0x953/0x13d0 sound/usb/pcm.c:1611 prepare_outbound_urb+0x377/0xc50 sound/usb/endpoint.c:333
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 02c56650f3c118d3752122996d96173d26bb13aa , < 480a1490c595a242f27493a4544b3efb21b29f6a (git)
Affected: 5ef30e443e6d3654cccecec99cf481a69a0a6d3b , < ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41 (git)
Affected: 99703c921864a318e3e8aae74fde071b1ff35bea , < 282aba56713bbc58155716b55ca7222b2d9cf3c8 (git)
Affected: 2d50acd7dbd0682a56968ad9551341d7fc5b6eaf , < c4dc012b027c9eb101583011089dea14d744e314 (git)
Affected: aba41867dd66939d336fdf604e4d73b805d8039f , < e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360 (git)
Affected: d288dc74f8cf95cb7ae0aaf245b7128627a49bf3 , < d67dde02049e632ba58d3c44a164a74b6a737154 (git)
Affected: f0bd62b64016508938df9babe47f65c2c727d25c , < 62932d9ed639a9fa71b4ac1a56766a4b43abb7e4 (git)
Affected: f0bd62b64016508938df9babe47f65c2c727d25c , < ef5749ef8b307bf8717945701b1b79d036af0a15 (git)
Affected: 4.4.229 , < 4.4.230 (semver)
Affected: 4.9.229 , < 4.9.230 (semver)
Affected: 4.14.186 , < 4.14.188 (semver)
Affected: 4.19.130 , < 4.19.132 (semver)
Affected: 5.4.49 , < 5.4.51 (semver)
Affected: 5.7.6 , < 5.7.8 (semver)
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Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 4.4.230 , ≤ 4.4.* (semver)
Unaffected: 4.9.230 , ≤ 4.9.* (semver)
Unaffected: 4.14.188 , ≤ 4.14.* (semver)
Unaffected: 4.19.132 , ≤ 4.19.* (semver)
Unaffected: 5.4.51 , ≤ 5.4.* (semver)
Unaffected: 5.7.8 , ≤ 5.7.* (semver)
Unaffected: 6.18.10 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Prevent excessive number of frames\n\nIn this case, the user constructed the parameters with maxpacksize 40\nfor rate 22050 / pps 1000, and packsize[0] 22 packsize[1] 23. The buffer\nsize for each data URB is maxpacksize * packets, which in this example\nis 40 * 6 = 240; When the user performs a write operation to send audio\ndata into the ALSA PCM playback stream, the calculated number of frames\nis packsize[0] * packets = 264, which exceeds the allocated URB buffer\nsize, triggering the out-of-bounds (OOB) issue reported by syzbot [1].\n\nAdded a check for the number of single data URB frames when calculating\nthe number of frames to prevent [1].\n\n[1]\nBUG: KASAN: slab-out-of-bounds in copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487\nWrite of size 264 at addr ffff88804337e800 by task syz.0.17/5506\nCall Trace:\n copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487\n prepare_playback_urb+0x953/0x13d0 sound/usb/pcm.c:1611\n prepare_outbound_urb+0x377/0xc50 sound/usb/endpoint.c:333"
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/ef5749ef8b307bf8717945701b1b79d036af0a15"
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The buffer\\nsize for each data URB is maxpacksize * packets, which in this example\\nis 40 * 6 = 240; When the user performs a write operation to send audio\\ndata into the ALSA PCM playback stream, the calculated number of frames\\nis packsize[0] * packets = 264, which exceeds the allocated URB buffer\\nsize, triggering the out-of-bounds (OOB) issue reported by syzbot [1].\\n\\nAdded a check for the number of single data URB frames when calculating\\nthe number of frames to prevent [1].\\n\\n[1]\\nBUG: KASAN: slab-out-of-bounds in copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487\\nWrite of size 264 at addr ffff88804337e800 by task syz.0.17/5506\\nCall Trace:\\n copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487\\n prepare_playback_urb+0x953/0x13d0 sound/usb/pcm.c:1611\\n prepare_outbound_urb+0x377/0xc50 sound/usb/endpoint.c:333\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nALSA: usb-audio: Prevenir un n\u00famero excesivo de tramas\\n\\nEn este caso, el usuario construy\u00f3 los par\u00e1metros con maxpacksize 40 para una tasa de 22050 / pps 1000, y packsize[0] 22 packsize[1] 23. El tama\u00f1o del b\u00fafer para cada URB de datos es maxpacksize * paquetes, que en este ejemplo es 40 * 6 = 240; Cuando el usuario realiza una operaci\u00f3n de escritura para enviar datos de audio al flujo de reproducci\u00f3n ALSA PCM, el n\u00famero calculado de tramas es packsize[0] * paquetes = 264, lo que excede el tama\u00f1o del b\u00fafer URB asignado, desencadenando el problema de fuera de l\u00edmites (OOB) reportado por syzbot [1].\\n\\nSe a\u00f1adi\u00f3 una comprobaci\u00f3n para el n\u00famero de tramas URB de datos individuales al calcular el n\u00famero de tramas para prevenir [1].\\n\\n[1]\\nBUG: KASAN: slab-out-of-bounds en copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487\\nEscritura de tama\u00f1o 264 en la direcci\u00f3n ffff88804337e800 por la tarea syz.0.17/5506\\nTraza de Llamada:\\n copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487\\n prepare_playback_urb+0x953/0x13d0 sound/usb/pcm.c:1611\\n prepare_outbound_urb+0x377/0xc50 sound/usb/endpoint.c:333\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"sound/usb/pcm.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"02c56650f3c118d3752122996d96173d26bb13aa\",\"lessThan\":\"480a1490c595a242f27493a4544b3efb21b29f6a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5ef30e443e6d3654cccecec99cf481a69a0a6d3b\",\"lessThan\":\"ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"99703c921864a318e3e8aae74fde071b1ff35bea\",\"lessThan\":\"282aba56713bbc58155716b55ca7222b2d9cf3c8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2d50acd7dbd0682a56968ad9551341d7fc5b6eaf\",\"lessThan\":\"c4dc012b027c9eb101583011089dea14d744e314\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"aba41867dd66939d336fdf604e4d73b805d8039f\",\"lessThan\":\"e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d288dc74f8cf95cb7ae0aaf245b7128627a49bf3\",\"lessThan\":\"d67dde02049e632ba58d3c44a164a74b6a737154\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f0bd62b64016508938df9babe47f65c2c727d25c\",\"lessThan\":\"62932d9ed639a9fa71b4ac1a56766a4b43abb7e4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f0bd62b64016508938df9babe47f65c2c727d25c\",\"lessThan\":\"ef5749ef8b307bf8717945701b1b79d036af0a15\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4.4.229\",\"lessThan\":\"4.4.230\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.9.229\",\"lessThan\":\"4.9.230\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.14.186\",\"lessThan\":\"4.14.188\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.130\",\"lessThan\":\"4.19.132\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.49\",\"lessThan\":\"5.4.51\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.7.6\",\"lessThan\":\"5.7.8\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"sound/usb/pcm.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.8\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.8\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.4.230\",\"lessThanOrEqual\":\"4.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.9.230\",\"lessThanOrEqual\":\"4.9.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.14.188\",\"lessThanOrEqual\":\"4.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.132\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.51\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.7.8\",\"lessThanOrEqual\":\"5.7.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.10\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19\",\"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:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-787\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.14.186\",\"versionEndExcluding\":\"4.14.188\",\"matchCriteriaId\":\"CD1BFF88-C8CF-4AA8-8E24-D13928FE0DD5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.19.130\",\"versionEndExcluding\":\"4.19.132\",\"matchCriteriaId\":\"87999705-F22E-4389-898A-B4B8DDDBDA7F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4.49\",\"versionEndExcluding\":\"5.4.51\",\"matchCriteriaId\":\"C5C83907-C9A6-43D6-AA4A-8B82C0E60FB9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.7.6\",\"version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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-08T12:23:09+00:00",
      "cve": "CVE-2026-23208",
      "id": "CVE-2026-23208",
      "initial_release_date": "2026-02-14T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ALSA: usb-audio: Prevent excessive number of frames",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23208.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-15T05:31:19Z",
      "cve": "CVE-2026-23208",
      "id": "CVE-2026-23208",
      "initial_release_date": "2026-02-16T00:24:55Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "411",
      "product_status:known_not_affected": "213",
      "product_status:recommended": "291",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23208",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23208.json",
      "version": "27"
    }
  }
}



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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.