CVE-2026-98577

Status: ReceivedUnscored—

Severity—Unscored

Exploitation probability0.21 %higher than 11% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitNot knownno public code found

In the Linux kernel, the following vulnerability has been resolved:

nfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()

nfc_llcp_wks_sap() compares only service_name_len bytes, so a short service_name like "u" matches longer WKS strings like "urn:nfc:sn:snep". Fix by requiring exact length match before strncmp().

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.21 %
Percentile among all scored CVEs: 11
Score date: 10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux Kernel^AI

References

Show 8 references

Raw JSON (NVD)

Show

{
  "id": "CVE-2026-98577",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "lessThan": "0c83a8a45fed256ccc5fe7160b436b671fc79fb8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "lessThan": "aa555ed5ed0d15efbaf27e0e9f152a6df715278a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "lessThan": "32b5f0b338bf59391a1cff9a6190a72c4d2c1ba8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "lessThan": "6fad2c34d451d11a9f3f946cae1105fee91d96b8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "lessThan": "bf41af8f910cbb5d776a1dfa0671d31a7e262e28",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "lessThan": "f234197f3bda3aea5d4b1e591d6bcb3660a8b3fc",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "lessThan": "0a0412745c86acd089c6460da715ab966b1615e7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "lessThan": "408cff6bd60636df201274d320edfdfde9ed41db",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/nfc/llcp_core.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.3"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.3",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/nfc/llcp_core.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-10-18T16:17:10.053",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0a0412745c86acd089c6460da715ab966b1615e7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/0c83a8a45fed256ccc5fe7160b436b671fc79fb8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/32b5f0b338bf59391a1cff9a6190a72c4d2c1ba8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/408cff6bd60636df201274d320edfdfde9ed41db",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6fad2c34d451d11a9f3f946cae1105fee91d96b8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/aa555ed5ed0d15efbaf27e0e9f152a6df715278a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bf41af8f910cbb5d776a1dfa0671d31a7e262e28",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f234197f3bda3aea5d4b1e591d6bcb3660a8b3fc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()\n\nnfc_llcp_wks_sap() compares only service_name_len bytes, so a short\nservice_name like \"u\" matches longer WKS strings like \"urn:nfc:sn:snep\".\nFix by requiring exact length match before strncmp()."
    }
  ],
  "lastModified": "2026-10-19T10:19:16.900",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}