mm/vmalloc: take vmap_purge_lock in shrinker_CVE-2026-46093

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmalloc: take vmap_purge_lock in shrinker\n\ndecay_va_pool_node() can be invoked concurrently from two paths:\n__purge_vmap_area_lazy() when pools are being purged, and the shrinker via\nvmap_node_shrink_scan().\n\nHowever, decay_va_pool_node() is not safe to run concurrently, and the\nshrinker path currently lacks serialization, leading to races and possible\nleaks.\n\nProtect decay_va_pool_node() by taking vmap_purge_lock in the shrinker\npath to ensure serialization with purge users.",
    "published": "2026-05-27T12:58:43.458Z",
    "modified": "2026-05-30T10:47:26.798Z",
    "type": "cve",
    "title": "mm/vmalloc: take vmap_purge_lock in shrinker",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/687ccdf582169cd680aeaf24cc953807c4cd4345\nhttps://git.kernel.org/stable/c/12f2341b4c235d5593a433abac201c1c6725787f\nhttps://git.kernel.org/stable/c/ec05f51f1e65bce95528543eb73fda56fd201d94",
    "id": "CVE-2026-46093",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 7679ba6b36dbb300b757b672d6a32a606499e14b\nLinux Linux 7679ba6b36dbb300b757b672d6a32a606499e14b\nLinux Linux 7679ba6b36dbb300b757b672d6a32a606499e14b\nLinux Linux 6.9",
    "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": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "7679ba6b36dbb300b757b672d6a32a606499e14b",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
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    "ai_score": 0
}