{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2025-40269",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-40269",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-06T21:50:50.229Z",
    "updatedAt": "2026-08-05T12:09:02.371Z",
    "importedAt": "2026-10-24T01:57:34.152Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "ALSA: usb-audio: Fix potential overflow of PCM transfer buffer",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Fix potential overflow of PCM transfer buffer\n\nThe PCM stream data in USB-audio driver is transferred over USB URB\npacket buffers, and each packet size is determined dynamically.  The\npacket sizes are limited by some factors such as wMaxPacketSize USB\ndescriptor.  OTOH, in the current code, the actually used packet sizes\nare determined only by the rate and the PPS, which may be bigger than\nthe size limit above.  This results in a buffer overflow, as reported\nby syzbot.\n\nBasically when the limit is smaller than the calculated packet size,\nit implies that something is wrong, most likely a weird USB\ndescriptor.  So the best option would be just to return an error at\nthe parameter setup time before doing any further operations.\n\nThis patch introduces such a sanity check, and returns -EINVAL when\nthe packet size is greater than maxpacksize.  The comparison with\nep->packsize[1] alone should suffice since it's always equal or\ngreater than ep->packsize[0].",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "02c56650f3c118d3752122996d96173d26bb13aa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "480a1490c595a242f27493a4544b3efb21b29f6a"
            },
            {
              "version": "5ef30e443e6d3654cccecec99cf481a69a0a6d3b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41"
            },
            {
              "version": "99703c921864a318e3e8aae74fde071b1ff35bea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "282aba56713bbc58155716b55ca7222b2d9cf3c8"
            },
            {
              "version": "2d50acd7dbd0682a56968ad9551341d7fc5b6eaf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c4dc012b027c9eb101583011089dea14d744e314"
            },
            {
              "version": "aba41867dd66939d336fdf604e4d73b805d8039f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360"
            },
            {
              "version": "d288dc74f8cf95cb7ae0aaf245b7128627a49bf3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d67dde02049e632ba58d3c44a164a74b6a737154"
            },
            {
              "version": "f0bd62b64016508938df9babe47f65c2c727d25c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6a5da3fa80affc948923f20a4e086177f505e86e"
            },
            {
              "version": "f0bd62b64016508938df9babe47f65c2c727d25c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "217d47255a2ec8b246f2725f5db9ac3f1d4109d7"
            },
            {
              "version": "f0bd62b64016508938df9babe47f65c2c727d25c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ef592bf2232a2daa9fffa8881881fc9957ea56e9"
            },
            {
              "version": "f0bd62b64016508938df9babe47f65c2c727d25c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ece3b981bb6620e47fac826a2156c090b1a936a0"
            },
            {
              "version": "f0bd62b64016508938df9babe47f65c2c727d25c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "98e9d5e33bda8db875cc1a4fe99c192658e45ab6"
            },
            {
              "version": "f0bd62b64016508938df9babe47f65c2c727d25c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d2c04f20ccc6c0d219e6d3038bab45bc66a178ad"
            },
            {
              "version": "f0bd62b64016508938df9babe47f65c2c727d25c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "05a1fc5efdd8560f34a3af39c9cf1e1526cc3ddf"
            },
            {
              "version": "4.4.229",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.4.230"
            },
            {
              "version": "4.9.229",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.9.230"
            },
            {
              "version": "4.14.186",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.14.188"
            },
            {
              "version": "4.19.130",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.19.132"
            },
            {
              "version": "5.4.49",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.4.51"
            },
            {
              "version": "5.7.6",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.7.8"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.8",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.8"
            },
            {
              "version": "4.4.230",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.4.*"
            },
            {
              "version": "4.9.230",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.9.*"
            },
            {
              "version": "4.14.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.132",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.51",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.7.8",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.7.*"
            },
            {
              "version": "5.10.247",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.197",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.159",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.117",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.59",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.17.9",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "version": "6.18",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}