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Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-003917)
medium Nessus Plugin ID 288230
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-2026-003917 advisory.An issue was discovered in can_can_gw_rcv in net/can/gw.c in the Linux kernel through 4.19.13. The CAN frame modification rules allow bitwise logical operations that can be also applied to the can_dlc field.
The privileged user root with CAP_NET_ADMIN can create a CAN frame modification rule that makes the data length code a higher value than the available CAN frame data size. In combination with a configured checksum calculation where the result is stored relatively to the end of the data (e.g. cgw_csum_xor_rel) the tail of the skb (e.g. frag_list pointer in skb_shared_info) can be rewritten which finally can cause a system crash. Because of a missing check, the CAN drivers may write arbitrary content beyond the data registers in the CAN controller's I/O memory when processing can-gw manipulated outgoing frames.
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?818558a1
http://www.nessus.org/u?9ca4b6d1
http://www.securityfocus.com/bid/106443
https://bugzilla.suse.com/show_bug.cgi?id=1120386
http://www.nessus.org/u?8160c436
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html
https://marc.info/?l=linux-netdev&m=154651842302479&w=2
https://marc.info/?l=linux-netdev&m=154661373531512&w=2
https://security-tracker.debian.org/tracker/CVE-2019-3701
https://support.f5.com/csp/article/K17957133
https://usn.ubuntu.com/3932-1/
https://usn.ubuntu.com/3932-2/
Plugin Details
Severity: Medium
ID: 288230
File Name: unity_linux_UTSA-2026-003917.nasl
Version: 1.2
Type: local
Published: 1/16/2026
Updated: 1/17/2026
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-2019-3701
CVSS v3
Risk Factor: Medium
Base Score: 4.4
Temporal Score: 4
Vector: CVSS:3.0/AV:L/AC:L/PR:H/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: 1/16/2026
Vulnerability Publication Date: 12/28/2018
Reference Information
CVE: CVE-2019-3701