{
    "id": "CVE-2023-0266",
    "published": "2023-01-30 14:15:10",
    "last_modified": "2026-06-17 05:25:09",
    "cvss_score": "7.9",
    "cvss_severity": "HIGH",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:H",
    "cwe": "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",
    "epss_score": "0.03702",
    "epss_percentile": "0.89349",
    "kev": 1,
    "kev_due": "2023-04-20",
    "has_exploit": 0,
    "updated_at": "2026-09-27 18:17:36",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2023-04-20."
    },
    "products": [
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "linux",
            "product": "linux_kernel"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2023-0266",
        "date_added": "2023-03-30",
        "due_date": "2023-04-20",
        "vendor": "Linux",
        "product": "Kernel",
        "name": "Linux Kernel Use-After-Free Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "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://github.com/torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e",
        "https://github.com/torvalds/linux/commit/becf9e5d553c2389d857a3c178ce80fdb34a02e1",
        "https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html",
        "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://github.com/torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e",
        "https://github.com/torvalds/linux/commit/becf9e5d553c2389d857a3c178ce80fdb34a02e1",
        "https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-0266"
    ]
}