{
  "id": "CVE-2023-0266",
  "url": "https://spydr.io/cve/CVE-2023-0266",
  "published": "2023-01-30T14:15:10.500Z",
  "modified": "2026-06-17T05:25:09.763Z",
  "score": 7,
  "severity": "high",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "score_source": "NVD",
  "epss": 0.03702,
  "epss_percentile": 0.89425,
  "exploited": true,
  "kev": {
    "added": "2023-03-30",
    "due": "2023-04-20",
    "action": "Apply updates per vendor instructions.",
    "ransomware": "Unknown",
    "name": "Linux Kernel Use-After-Free Vulnerability",
    "notes": "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; https://nvd.nist.gov/vuln/detail/CVE-2023-0266"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "Linux"
  ],
  "products": [
    "Linux Kernel"
  ],
  "cwes": [
    "CWE-416"
  ],
  "description": "A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel. SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be used in a use-after-free that can result in a priviledge escalation to gain ring0 access from the system user. We recommend upgrading past commit 56b88b50565cd8b946a2d00b0c83927b7ebb055e",
  "status": "Analyzed",
  "score_type": "Primary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 7,
    "cvss_v30": null
  },
  "references": [
    {
      "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",
      "tags": [
        "Mailing List",
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/torvalds/linux/commit/becf9e5d553c2389d857a3c178ce80fdb34a02e1",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-0266",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2023-0266",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}