{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2023-0266",
  "revision": 1,
  "title": "Linux Kernel Sound Subsystem — Use-After-Free Escalation",
  "summary": "Missing locks in the sound subsystem of the Linux kernel allow a use-after-free, which a local system user can turn into privilege escalation with ring0 access.",
  "source_type": "cve",
  "severity": "high",
  "cvss": {
    "score": 7,
    "vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "version": "3.1"
  },
  "epss": 0.03702,
  "exploitation": {
    "known_exploited": true,
    "exploit_available": false,
    "attack_complexity": "high",
    "kev_added": "2023-03-30",
    "kev_due": "2023-04-20",
    "prerequisites": "Local access as a system user on an affected Linux host."
  },
  "remediation": {
    "patch_available": true
  },
  "kill_chain": "privilege_escalation",
  "recommended_action": "Update the Linux kernel past commit 56b88b50565cd8b946a2d00b0c83927b7ebb055e.",
  "confidence": "high",
  "provenance": [
    {
      "fields": [
        "cvss",
        "exploitation.attack_complexity",
        "exploitation.exploit_available",
        "published_at",
        "references"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2023-0266",
      "retrieved_at": "2026-11-05T08:18:20.755Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "exploitation.known_exploited",
        "exploitation.kev_added",
        "exploitation.kev_due"
      ],
      "source": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "retrieved_at": "2026-11-05T08:18:20.755Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "epss"
      ],
      "source": "https://api.first.org/data/v1/epss?cve=CVE-2023-0266",
      "retrieved_at": "2026-11-05T08:18:20.755Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "title",
        "subtitle",
        "summary",
        "severity",
        "remediation",
        "mitre_attack",
        "kill_chain",
        "recommended_action",
        "confidence",
        "tags",
        "exploitation.prerequisites"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2023-0266",
      "retrieved_at": "2026-11-05T08:18:20.755Z",
      "confidence": "high",
      "extractor": "claude-code"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-0266",
      "label": "NVD record"
    },
    {
      "type": "cisa",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "label": "CISA Known Exploited Vulnerabilities catalog"
    },
    {
      "type": "vendor_advisory",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-5.10/alsa-pcm-move-rwsem-lock-inside-snd_ctl_elem_read-to-prevent-uaf.patch?id=72783cf35e6c55bca84c4bb7b776c58152856fd4"
    },
    {
      "type": "vendor_advisory",
      "url": "https://github.com/torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e"
    },
    {
      "type": "vendor_advisory",
      "url": "https://github.com/torvalds/linux/commit/becf9e5d553c2389d857a3c178ce80fdb34a02e1"
    }
  ],
  "published_at": "2023-01-30T14:15:10.500Z",
  "issued_at": "2026-11-05T08:18:20.755Z",
  "tags": [
    "linux",
    "kernel",
    "use-after-free"
  ]
}