UBUNTU-CVE-2016-6828

Advisory lineage Upstream: 1 Downstream: 5
Upstream
CVE-2016-6828
Published: 18 Aug 2016, 00:00
Last modified:22 Apr 2026, 10:55

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
3.0 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

18 Aug 2016, 00:00
Published
Vulnerability first disclosed
22 Apr 2026, 10:55
Last Modified
Vulnerability information updated

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 Metrics

  • v3.0•MEDIUM•Score: 5.5CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Systems

  • ubuntu•linux

    < 3.13.0-98.145 | < 4.4.0-42.62

  • ubuntu•linux-lts-vivid

    < 3.19.0-71.79~14.04.1

  • ubuntu•linux-lts-xenial

    < 4.4.0-42.62~14.04.1

  • ubuntu•linux-raspi2

    < 4.4.0-1027.33

  • ubuntu•linux-snapdragon

    < 4.4.0-1030.33

References (11)