cryptodev-linux <= 1.14 get_userbuf Use After Free LPE

{
  "id": "d8b18960ca598be83e9963886b6cfeef0065eb8152786a59703f7fa2b2a1d3d4",
  "url": "https://osv.dev/vulnerability/CVE-2026-28529",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "cryptodev-linux <= 1.14 get_userbuf Use After Free LPE",
    "summary": "cryptodev-linux version 1.14 and prior contain a page reference handling flaw in the get_userbuf function of the /dev/crypto device driver that allows local users to trigger use-after-free conditions. Attackers with access to the /dev/crypto interface can repeatedly decrement reference counts of controlled pages to achieve local privilege escalation.",
    "evidence": "osv:CVE-2026-28529",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-28529",
      "aliases": [
        "CVE-2026-28529"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cryptodev-linux/cryptodev-linux",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "135cbff90af2ba97d88f1472be595ce78721972c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.14"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "cpe": "cpe:2.3:a:cryptodev-linux:cryptodev-linux:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.14"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "cryptodev-linux-1.14",
            "cryptodev-linux-1.13",
            "cryptodev-linux-1.12",
            "cryptodev-linux-1.11",
            "cryptodev-linux-1.10",
            "cryptodev-linux-1.9",
            "cryptodev-linux-1.8",
            "cryptodev-linux-1.7",
            "cryptodev-linux-1.6",
            "cryptodev-linux-1.5",
            "cryptodev-linux-1.4",
            "cryptodev-linux-1.3",
            "cryptodev-linux-1.2",
            "cryptodev-linux-1.1",
            "cryptodev-linux-1.0",
            "cryptodev-linux-0.9",
            "cryptodev-0.8",
            "cryptodev-linux-0.7",
            "cryptodev-linux-0.6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28529.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.271868452Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28529.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28529",
        "https://www.vulncheck.com/advisories/cryptodev-linux-get-userbuf-use-after-free-lpe",
        "https://github.com/cryptodev-linux/cryptodev-linux/pull/104",
        "https://github.com/cryptodev-linux/cryptodev-linux",
        "https://gist.github.com/n4sm/0fd2479e0c23e0fa2f192cd8fda45750",
        "https://nasm.re/posts/cryptodev-linux-vuln/"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-416"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28529.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-28529",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 503345,
  "published_at": "2026-03-25T13:00:58.783+00:00"
}