VulnerabilityModified
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…
MEDIUM 5.5EPSS 1.18%
Does this matter?
Lower severity and a low EPSS score (1.18%). Track it; it rarely justifies an emergency change on its own.
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 3.0
- 5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.18% probability · 66th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- secalert@redhat.com
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb1fceca22492109be12640d49f5ea5a544c6bb4Issue Tracking, Patch
- 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 Notes, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/08/15/1Exploit, Third Party Advisory
- http://www.securityfocus.com/bid/92452
- https://bugzilla.redhat.com/show_bug.cgi?id=1367091Issue Tracking, Third Party Advisory
- https://github.com/torvalds/linux/commit/bb1fceca22492109be12640d49f5ea5a544c6bb4Issue Tracking, Patch
- 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=bb1fceca22492109be12640d49f5ea5a544c6bb4Issue Tracking, Patch
- 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 Notes, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/08/15/1Exploit, Third Party Advisory
- http://www.securityfocus.com/bid/92452
- https://bugzilla.redhat.com/show_bug.cgi?id=1367091Issue Tracking, Third Party Advisory
- https://github.com/torvalds/linux/commit/bb1fceca22492109be12640d49f5ea5a544c6bb4Issue Tracking, Patch
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.