CVE-2016-6828

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.

References

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

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

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

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

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

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

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

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

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

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

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

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3