{
  "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-2026-64028",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64028",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T15:39:19.102Z",
    "updatedAt": "2026-07-19T15:39:19.102Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "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": "tracing: Avoid NULL return from hist_field_name() on truncation",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Avoid NULL return from hist_field_name() on truncation\n\nhist_field_name() returns \"\" everywhere except the fully-qualified\nVAR_REF/EXPR case, where snprintf() truncation returns NULL early\nand bypasses the bottom NULL->\"\" guard. Callers don't expect NULL:\nstrcat(expr, hist_field_name(field, 0)) at trace_events_hist.c:1758\nand the strcmp() in the sort-key match loop at :4804 both deref it.\n\nsystem and event_name are bounded by MAX_EVENT_NAME_LEN, but the\nfield name on a VAR_REF is kstrdup'd from a histogram variable\nname parsed out of the trigger string and has no length cap, so\na long enough var name in a fully qualified reference can reach\nthe truncation path.\n\nKeep the length check but leave field_name as \"\" on overflow.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2e8578364061c4e88ae33bc20c2d6f64f365f6a2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e3f5d42cdc2f167719564693675f1eead81378ea"
            },
            {
              "version": "dfd1cd57ee6067301841b7b0967c70f910a51150",
              "status": "affected",
              "versionType": "git",
              "lessThan": "37377b39ff86dacbc533275c1155210d4fd5dc91"
            },
            {
              "version": "e5c223f46c2e0691461dd97510c15e1f77148872",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0402a1d3ddec565132867337ed44514a09d84728"
            },
            {
              "version": "9399a92989354e34086f9a5c379493217df83c5e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e91687643c440ca3997d67646e6f80b92edc6703"
            },
            {
              "version": "3cb6cb9c5a547a1979ad74f38eefe8e3687d96e0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "be4e99038c1603fa6b329d8ee3e364825e17c353"
            },
            {
              "version": "0402c60abe769098d77f3b3bd1e29a97922b614b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d6c8b3ebdcdb12b59ad4212acb137cc56cae453d"
            },
            {
              "version": "6929e650db8451a9975ac0a631ba2d6e5d1e80ba",
              "status": "affected",
              "versionType": "git",
              "lessThan": "915c1254fe0788abddc31095b360e9dc98907a34"
            },
            {
              "version": "5ec1d1e97de134beed3a5b08235a60fc1c51af96",
              "status": "affected",
              "versionType": "git",
              "lessThan": "576ec047d20b368b43c4d5db98c4f2e0f3c101ec"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "6.6.141",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.142"
            },
            {
              "version": "6.12.91",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.92"
            },
            {
              "version": "6.18.33",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.18.34"
            },
            {
              "version": "7.0.10",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "7.0.11"
            }
          ]
        }
      ]
    }
  }
}