um: Fix potential race condition in TLB sync_CVE-2026-53020

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\num: Fix potential race condition in TLB sync\n\nDuring the TLB sync, we need to traverse and modify the page table,\nso we should hold the page table lock. Since full SMP support for\nthreads within the same process is still missing, let's disable the\nsplit page table lock for simplicity.",
    "published": "2026-06-24T16:29:29.796Z",
    "modified": "2026-06-28T06:38:06.162Z",
    "type": "cve",
    "title": "um: Fix potential race condition in TLB sync",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/f21c343ec7419377bff89ab11146c03ae117036f\nhttps://git.kernel.org/stable/c/102331b66bcaf1f41f50b9c4cd5c36e46bafa9f3",
    "id": "CVE-2026-53020",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 1e4ee5135d814fe4785890790cec81c3132888fb\nLinux Linux 1e4ee5135d814fe4785890790cec81c3132888fb\nLinux Linux 6.19",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
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        "cvssV3": {
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    "href": "",
    "category_name": "CVE",
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    "product": "Linux",
    "version": "1e4ee5135d814fe4785890790cec81c3132888fb",
    "vendor": "Linux",
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}