Detections
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Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-002909)
medium Nessus Plugin ID 287117
Synopsis
The Unity Linux host is missing one or more security updates.Description
The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002909 advisory.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.
Tenable has extracted the preceding description block directly from the Unity Linux security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the affected kernel package.See Also
http://www.nessus.org/u?3a1a2c51
http://www.nessus.org/u?e9e51c0c
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-4.7.5
http://www.openwall.com/lists/oss-security/2016/08/15/1
http://www.securityfocus.com/bid/92452
https://bugzilla.redhat.com/show_bug.cgi?id=1367091
http://www.nessus.org/u?75e7850c
http://www.nessus.org/u?bf88b380
https://security-tracker.debian.org/tracker/CVE-2016-6828
https://source.android.com/security/bulletin/2016-11-01.html
Plugin Details
Severity: Medium
ID: 287117
File Name: unity_linux_UTSA-2026-002909.nasl
Version: 1.2
Type: local
Published: 1/15/2026
Updated: 1/16/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 4.9
Temporal Score: 3.8
Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2016-6828
CVSS v3
Risk Factor: Medium
Base Score: 5.5
Temporal Score: 5
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
Required KB Items: Host/local_checks_enabled, Host/UOS-Server/release, Host/UOS-Server/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 1/15/2026
Vulnerability Publication Date: 8/15/2016
Reference Information
CVE: CVE-2016-6828