CVE-2016-6828

Published: Oct 16, 2016Modified: May 6, 2026

5.5

Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitability: 1.8 / Impact: 3.6

Source: NVD

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.

Affected (1)

Products: Linux: Linux Kernel

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Linux Linux Kernel	Up to 4.7.4

Related CWEs

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (24)

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb1fceca22492109be12640d49f5ea5a544c6bb4

Source: secalert@redhat.com

Issue TrackingPatch

http://rhn.redhat.com/errata/RHSA-2017-0036.html

Source: secalert@redhat.com

http://rhn.redhat.com/errata/RHSA-2017-0086.html

Source: secalert@redhat.com

http://rhn.redhat.com/errata/RHSA-2017-0091.html

Source: secalert@redhat.com

http://rhn.redhat.com/errata/RHSA-2017-0113.html

Source: secalert@redhat.com

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.7.5

Source: secalert@redhat.com

Release NotesThird Party Advisory

http://www.openwall.com/lists/oss-security/2016/08/15/1

Source: secalert@redhat.com

ExploitThird Party Advisory

http://www.securityfocus.com/bid/92452

Source: secalert@redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=1367091

Source: secalert@redhat.com

Issue TrackingThird Party Advisory

https://github.com/torvalds/linux/commit/bb1fceca22492109be12640d49f5ea5a544c6bb4

Source: secalert@redhat.com

Issue TrackingPatch

https://marcograss.github.io/security/linux/2016/08/18/cve-2016-6828-linux-kernel-tcp-uaf.html

Source: secalert@redhat.com

https://source.android.com/security/bulletin/2016-11-01.html

Source: secalert@redhat.com

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb1fceca22492109be12640d49f5ea5a544c6bb4

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingPatch

http://rhn.redhat.com/errata/RHSA-2017-0036.html

Source: af854a3a-2127-422b-91ae-364da2661108

http://rhn.redhat.com/errata/RHSA-2017-0086.html

Source: af854a3a-2127-422b-91ae-364da2661108

http://rhn.redhat.com/errata/RHSA-2017-0091.html

Source: af854a3a-2127-422b-91ae-364da2661108

http://rhn.redhat.com/errata/RHSA-2017-0113.html

Source: af854a3a-2127-422b-91ae-364da2661108

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.7.5

Source: af854a3a-2127-422b-91ae-364da2661108

Release NotesThird Party Advisory

http://www.openwall.com/lists/oss-security/2016/08/15/1

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitThird Party Advisory

http://www.securityfocus.com/bid/92452

Source: af854a3a-2127-422b-91ae-364da2661108

https://bugzilla.redhat.com/show_bug.cgi?id=1367091

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingThird Party Advisory

https://github.com/torvalds/linux/commit/bb1fceca22492109be12640d49f5ea5a544c6bb4

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingPatch

https://marcograss.github.io/security/linux/2016/08/18/cve-2016-6828-linux-kernel-tcp-uaf.html

Source: af854a3a-2127-422b-91ae-364da2661108

https://source.android.com/security/bulletin/2016-11-01.html

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.