5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.9 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
kernel-rt is vulnerable to denial of service (DoS) attacks. The vulnerability exists as 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.
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb1fceca22492109be12640d49f5ea5a544c6bb4
rhn.redhat.com/errata/RHSA-2017-0036.html
rhn.redhat.com/errata/RHSA-2017-0086.html
rhn.redhat.com/errata/RHSA-2017-0091.html
rhn.redhat.com/errata/RHSA-2017-0113.html
www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.7.5
www.openwall.com/lists/oss-security/2016/08/15/1
www.securityfocus.com/bid/92452
access.redhat.com/errata/RHSA-2017:0036
access.redhat.com/errata/RHSA-2017:0086
access.redhat.com/errata/RHSA-2017:0091
access.redhat.com/errata/RHSA-2017:0113
access.redhat.com/security/cve/CVE-2016-6828
access.redhat.com/security/cve/CVE-2017-13167
access.redhat.com/security/updates/classification/#important
access.redhat.com/security/vulnerabilities/2706661
bugzilla.redhat.com/show_bug.cgi?id=1346444
bugzilla.redhat.com/show_bug.cgi?id=1357997
bugzilla.redhat.com/show_bug.cgi?id=1367091
bugzilla.redhat.com/show_bug.cgi?id=1378982
bugzilla.redhat.com/show_bug.cgi?id=1400193
bugzilla.redhat.com/show_bug.cgi?id=1400305
bugzilla.redhat.com/show_bug.cgi?id=1401779
github.com/torvalds/linux/commit/bb1fceca22492109be12640d49f5ea5a544c6bb4
marcograss.github.io/security/linux/2016/08/18/cve-2016-6828-linux-kernel-tcp-uaf.html
source.android.com/security/bulletin/2016-11-01.html
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.9 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C