Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 4.7.4 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb1fceIssue TrackingPatch
- 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-4.7.5Release NotesThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/08/15/1ExploitThird Party Advisory
- http://www.securityfocus.com/bid/92452
- https://bugzilla.redhat.com/show_bug.cgi?id=1367091Issue TrackingThird Party Advisory
- https://github.com/torvalds/linux/commit/bb1fceca22492109be12640d49f5ea5a544c6bbIssue TrackingPatch
- https://marcograss.github.io/security/linux/2016/08/18/cve-2016-6828-linux-kerne
- https://source.android.com/security/bulletin/2016-11-01.html
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb1fceIssue TrackingPatch
- http://rhn.redhat.com/errata/RHSA-2017-0036.html
- http://rhn.redhat.com/errata/RHSA-2017-0086.html
FAQ
What is CVE-2016-6828?
CVE-2016-6828 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 denia...
How severe is CVE-2016-6828?
CVE-2016-6828 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-6828?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.