{
  "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-2026-31778",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31778",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-01T14:15:05.804Z",
    "updatedAt": "2026-05-11T22:15:37.687Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "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: caiaq: fix stack out-of-bounds read in init_card",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: caiaq: fix stack out-of-bounds read in init_card\n\nThe loop creates a whitespace-stripped copy of the card shortname\nwhere `len < sizeof(card->id)` is used for the bounds check. Since\nsizeof(card->id) is 16 and the local id buffer is also 16 bytes,\nwriting 16 non-space characters fills the entire buffer,\noverwriting the terminating nullbyte.\n\nWhen this non-null-terminated string is later passed to\nsnd_card_set_id() -> copy_valid_id_string(), the function scans\nforward with `while (*nid && ...)` and reads past the end of the\nstack buffer, reading the contents of the stack.\n\nA USB device with a product name containing many non-ASCII, non-space\ncharacters (e.g. multibyte UTF-8) will reliably trigger this as follows:\n\n  BUG: KASAN: stack-out-of-bounds in copy_valid_id_string\n       sound/core/init.c:696 [inline]\n  BUG: KASAN: stack-out-of-bounds in snd_card_set_id_no_lock+0x698/0x74c\n       sound/core/init.c:718\n\nThe off-by-one has been present since commit bafeee5b1f8d (\"ALSA:\nsnd_usb_caiaq: give better shortname\") from June 2009 (v2.6.31-rc1),\nwhich first introduced this whitespace-stripping loop. The original\ncode never accounted for the null terminator when bounding the copy.\n\nFix this by changing the loop bound to `sizeof(card->id) - 1`,\nensuring at least one byte remains as the null terminator.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "bafeee5b1f8d32cbf791c322b40a6fa91d8ccf7a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "02d9c5b0b5553a391448b6d655262bd829f90234"
            },
            {
              "version": "bafeee5b1f8d32cbf791c322b40a6fa91d8ccf7a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3f7f8bae0d52cbd07ab04b76b6aac89ef98ee9f6"
            },
            {
              "version": "bafeee5b1f8d32cbf791c322b40a6fa91d8ccf7a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "66194c2575a4f567577ae70b1d7561163ce791a6"
            },
            {
              "version": "bafeee5b1f8d32cbf791c322b40a6fa91d8ccf7a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a82c1bce2d1299dd3c686a8fe48cf75b79a403c7"
            },
            {
              "version": "bafeee5b1f8d32cbf791c322b40a6fa91d8ccf7a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3178b62e2e31bab39f63d4c8e54bf4ee0a425627"
            },
            {
              "version": "bafeee5b1f8d32cbf791c322b40a6fa91d8ccf7a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3afa2e67f3523a980a2f90fd63c22322ac2b9ce0"
            },
            {
              "version": "bafeee5b1f8d32cbf791c322b40a6fa91d8ccf7a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7594a6464873d90fd229e5b94cdd3b92c9feabed"
            },
            {
              "version": "bafeee5b1f8d32cbf791c322b40a6fa91d8ccf7a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "45424e871abf2a152e247a9cff78359f18dd95c0"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.31",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.31"
            },
            {
              "version": "5.10.253",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.203",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.168",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.134",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.81",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.22",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}