CVE Feed

    Dashboard / CVE / CVE-2016-6828

    CVE-2016-6828

    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.

    Published:Aug 15, 2016
    Last Modified:Apr 12, 2025
    EPS:Oct 16, 2016
    EPSS Score:0.00098
    CVSS Score:5.5

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Mrg
    Vendor
    Redhat
    Product
    Rhel Extras Rt

    Exploits

    http://www.openwall.com/lists/oss-security/2016/08/15/1http://www.openwall.com/lists/oss-security/2016/08/15/1https://www.exploit-db.com/exploits/40731

    Common Weakness Enumeration

    CWE-416 Use After Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-80925 — In the Linux kernel, the following vulnerability has been resolved: vlan: fix skb_under_panic and races when …
    CVE-2026-80924 (CVSS 7.5) — In the Linux kernel, the following vulnerability has been resolved: crypto: krb5 - use kfree_sensitive() for …
    CVE-2026-80923 — In the Linux kernel, the following vulnerability has been resolved: xhci: dbgtty: Fix unregister on tty_regis…
    CVE-2026-80922 — In the Linux kernel, the following vulnerability has been resolved: crypto: qcom-rng - Allow zero as a random…
    CVE-2026-80921 (CVSS 8.8) — In the Linux kernel, the following vulnerability has been resolved: KVM: s390: vsie: zero stale crypto bits …
    CVE-2026-80920 — In the Linux kernel, the following vulnerability has been resolved: io_uring: defer eventfd signaling when qu…
    CVE-2026-80919 — In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix recursive ww_mutex acquir…
    CVE-2026-80918 — In the Linux kernel, the following vulnerability has been resolved: HID: core: fix number/pointer type confus…
    CVE-2026-80917 — In the Linux kernel, the following vulnerability has been resolved: PCI: host-generic: Fix NULL pointer deref…
    CVE-2026-80916 — In the Linux kernel, the following vulnerability has been resolved: kcov: fix data corruption and race condit…

    References

    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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High