CVE-2026-23208 (GCVE-0-2026-23208)
Vulnerability from cvelistv5
Published
2026-02-14 16:27
Modified
2026-02-16 08:58
Severity ?
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
References
Impacted products
Vendor Product Version
Linux Linux Version: 02c56650f3c118d3752122996d96173d26bb13aa
Version: 5ef30e443e6d3654cccecec99cf481a69a0a6d3b
Version: 99703c921864a318e3e8aae74fde071b1ff35bea
Version: 2d50acd7dbd0682a56968ad9551341d7fc5b6eaf
Version: aba41867dd66939d336fdf604e4d73b805d8039f
Version: d288dc74f8cf95cb7ae0aaf245b7128627a49bf3
Version: f0bd62b64016508938df9babe47f65c2c727d25c
Version: f0bd62b64016508938df9babe47f65c2c727d25c
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/usb/pcm.c"
          ],
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.8"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "4.4.230",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "4.9.230",
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              "status": "unaffected",
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              "version": "5.4.51",
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              "status": "unaffected",
              "version": "5.7.8",
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              "version": "6.18.10",
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              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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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-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"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-16T08:58:58.667Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/480a1490c595a242f27493a4544b3efb21b29f6a"
        },
        {
          "url": "https://git.kernel.org/stable/c/ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41"
        },
        {
          "url": "https://git.kernel.org/stable/c/282aba56713bbc58155716b55ca7222b2d9cf3c8"
        },
        {
          "url": "https://git.kernel.org/stable/c/c4dc012b027c9eb101583011089dea14d744e314"
        },
        {
          "url": "https://git.kernel.org/stable/c/e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360"
        },
        {
          "url": "https://git.kernel.org/stable/c/d67dde02049e632ba58d3c44a164a74b6a737154"
        },
        {
          "url": "https://git.kernel.org/stable/c/62932d9ed639a9fa71b4ac1a56766a4b43abb7e4"
        },
        {
          "url": "https://git.kernel.org/stable/c/ef5749ef8b307bf8717945701b1b79d036af0a15"
        }
      ],
      "title": "ALSA: usb-audio: Prevent excessive number of frames",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23208",
    "datePublished": "2026-02-14T16:27:30.441Z",
    "dateReserved": "2026-01-13T15:37:45.986Z",
    "dateUpdated": "2026-02-16T08:58:58.667Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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