{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "02a47617cdce440f60c71a51f3a93f9f5fcc5a7a"
            },
            {
              "fixed": "6054fed6bad08b6d03973e8ffca7f0c9394d1c30"
            },
            {
              "fixed": "eac733a0b6fe0a52d91f9f623425735ed50ac6c2"
            },
            {
              "fixed": "95e0ed2439dd1792eb454c68ae8d10f30ffe3bff"
            },
            {
              "fixed": "056eea1a2068ad2fb7c3093c5f1095268f87d0c7"
            },
            {
              "fixed": "1bf499e438da80455e258049bce60ffb3a53f3fa"
            },
            {
              "fixed": "c4487e4d5309de587479ecc2f5173b49586f46f4"
            },
            {
              "fixed": "f97022fefe6eb06ee18549d603420440f2959802"
            },
            {
              "fixed": "77e5eb0e192aec6710c03ca8144582fd2af36ca4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.28"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90327.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nphonet: pep: do not write beyond optlen in getsockopt\n\npep_getsockopt() clamps the reported length to the caller's buffer with\nmin_t(), but then stores the value with put_user(val, (int __user *)\noptval), which always writes sizeof(int) bytes. A getsockopt() call with\nan optlen smaller than sizeof(int) thus reports the clamped length yet\nwrites a full int, one to three bytes past the user buffer.\n\nWrite the value with copy_to_user() bounded by len, so at most optlen\nbytes are copied, matching the length reported back to userspace.",
  "id": "CVE-2026-90327",
  "modified": "2026-09-19T03:30:54.538389477Z",
  "published": "2026-09-17T16:08:42.017Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/056eea1a2068ad2fb7c3093c5f1095268f87d0c7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1bf499e438da80455e258049bce60ffb3a53f3fa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6054fed6bad08b6d03973e8ffca7f0c9394d1c30"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77e5eb0e192aec6710c03ca8144582fd2af36ca4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95e0ed2439dd1792eb454c68ae8d10f30ffe3bff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4487e4d5309de587479ecc2f5173b49586f46f4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eac733a0b6fe0a52d91f9f623425735ed50ac6c2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f97022fefe6eb06ee18549d603420440f2959802"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90327.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90327"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "phonet: pep: do not write beyond optlen in getsockopt"
}