netfilter: bpf: defer hook memory release until rcu readers are done_CVE-2026-23412

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: bpf: defer hook memory release until rcu readers are done\n\nYiming Qian reports UaF when concurrent process is dumping hooks via\nnfnetlink_hooks:\n\nBUG: KASAN: slab-use-after-free in nfnl_hook_dump_one.isra.0+0xe71/0x10f0\nRead of size 8 at addr ffff888003edbf88 by task poc/79\nCall Trace:\n <TASK>\n nfnl_hook_dump_one.isra.0+0xe71/0x10f0\n netlink_dump+0x554/0x12b0\n nfnl_hook_get+0x176/0x230\n [..]\n\nDefer release until after concurrent readers have completed.",
    "published": "2026-04-02T11:40:53.528Z",
    "modified": "2026-04-27T14:02:10.971Z",
    "type": "cve",
    "title": "netfilter: bpf: defer hook memory release until rcu readers are done",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/d016c216bc75c45128160593a77b864a04dbe7c0\nhttps://git.kernel.org/stable/c/cb2bf5efdb02a2a59faf603604a1066e8266f349\nhttps://git.kernel.org/stable/c/c25e0dec366ae99b7264324ce3c7cbaea34691f9\nhttps://git.kernel.org/stable/c/54244d54a971c26a0cd0a9073460ff71f3c51b32\nhttps://git.kernel.org/stable/c/24f90fa3994b992d1a09003a3db2599330a5232a",
    "id": "CVE-2026-23412",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 84601d6ee68ae820dec97450934797046d62db4b\nLinux Linux 84601d6ee68ae820dec97450934797046d62db4b\nLinux Linux 84601d6ee68ae820dec97450934797046d62db4b\nLinux Linux 84601d6ee68ae820dec97450934797046d62db4b\nLinux Linux 84601d6ee68ae820dec97450934797046d62db4b\nLinux Linux 6.4",
    "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": "84601d6ee68ae820dec97450934797046d62db4b",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}