{
  "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-2026-31780",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31780",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-01T14:15:07.253Z",
    "updatedAt": "2026-08-05T12:25:08.895Z",
    "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": "wifi: wilc1000: fix u8 overflow in SSID scan buffer size calculation",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wilc1000: fix u8 overflow in SSID scan buffer size calculation\n\nThe variable valuesize is declared as u8 but accumulates the total\nlength of all SSIDs to scan. Each SSID contributes up to 33 bytes\n(IEEE80211_MAX_SSID_LEN + 1), and with WILC_MAX_NUM_PROBED_SSID (10)\nSSIDs the total can reach 330, which wraps around to 74 when stored\nin a u8.\n\nThis causes kmalloc to allocate only 75 bytes while the subsequent\nmemcpy writes up to 331 bytes into the buffer, resulting in a 256-byte\nheap buffer overflow.\n\nWiden valuesize from u8 to u32 to accommodate the full range.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "c5c77ba18ea66aa05441c71e38473efb787705a4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "34a23fd9ddd683a03c7e8cc0ceded3e59e354b99"
            },
            {
              "version": "c5c77ba18ea66aa05441c71e38473efb787705a4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "549f02d8ec94d39092ab6d9b103d0d6783a4b024"
            },
            {
              "version": "c5c77ba18ea66aa05441c71e38473efb787705a4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bfbddeadd4779651403035ee177ae2f22f9f5521"
            },
            {
              "version": "c5c77ba18ea66aa05441c71e38473efb787705a4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9907ac9b9a18b92fc34b9e4cb9e10f208dc1d3f7"
            },
            {
              "version": "c5c77ba18ea66aa05441c71e38473efb787705a4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c97b2a00059608592ad0d86fbb813a4f8cf9464b"
            },
            {
              "version": "c5c77ba18ea66aa05441c71e38473efb787705a4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d8388614de613c28eeb659c10115060a83739924"
            },
            {
              "version": "c5c77ba18ea66aa05441c71e38473efb787705a4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0c7f21d8bd2f93998b72b7a7f93152336aeca4dd"
            },
            {
              "version": "c5c77ba18ea66aa05441c71e38473efb787705a4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d049e56b1739101d1c4d81deedb269c52a8dbba0"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.2",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.2"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}