{
    "id": "CVE-2016-6828",
    "published": "2016-10-16 21:59:08",
    "last_modified": "2026-06-17 00:51:50",
    "cvss_score": "5.5",
    "cvss_severity": "MEDIUM",
    "cvss_version": "3.0",
    "cvss_vector": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
    "cwe": "CWE-416",
    "description": "The tcp_check_send_head function in include/net/tcp.h in the Linux kernel before 4.7.5 does not properly maintain certain SACK state after a failed data copy, which allows local users to cause a denial of service (tcp_xmit_retransmit_queue use-after-free and system crash) via a crafted SACK option.",
    "epss_score": "0.01181",
    "epss_percentile": "0.66877",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-11 18:17:14",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "linux",
            "product": "linux_kernel"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "40731",
            "title": "Linux Kernel - TCP Related Read Use-After-Free",
            "date": "2016-08-18",
            "url": "https://www.exploit-db.com/exploits/40731"
        }
    ],
    "refs_list": [
        "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb1fceca22492109be12640d49f5ea5a544c6bb4",
        "http://rhn.redhat.com/errata/RHSA-2017-0036.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0086.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0091.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0113.html",
        "http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.7.5",
        "http://www.openwall.com/lists/oss-security/2016/08/15/1",
        "http://www.securityfocus.com/bid/92452",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1367091",
        "https://github.com/torvalds/linux/commit/bb1fceca22492109be12640d49f5ea5a544c6bb4",
        "https://marcograss.github.io/security/linux/2016/08/18/cve-2016-6828-linux-kernel-tcp-uaf.html",
        "https://source.android.com/security/bulletin/2016-11-01.html",
        "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb1fceca22492109be12640d49f5ea5a544c6bb4",
        "http://rhn.redhat.com/errata/RHSA-2017-0036.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0086.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0091.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0113.html",
        "http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.7.5",
        "http://www.openwall.com/lists/oss-security/2016/08/15/1",
        "http://www.securityfocus.com/bid/92452",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1367091",
        "https://github.com/torvalds/linux/commit/bb1fceca22492109be12640d49f5ea5a544c6bb4",
        "https://marcograss.github.io/security/linux/2016/08/18/cve-2016-6828-linux-kernel-tcp-uaf.html",
        "https://source.android.com/security/bulletin/2016-11-01.html"
    ]
}