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Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-003851)
medium Nessus Plugin ID 288551
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-2026-003851 advisory.A NULL pointer dereference flaw was found in the Linux kernel's SELinux subsystem in versions before 5.7.
This flaw occurs while importing the Commercial IP Security Option (CIPSO) protocol's category bitmap into the SELinux extensible bitmap via the' ebitmap_netlbl_import' routine. While processing the CIPSO restricted bitmap tag in the 'cipso_v4_parsetag_rbm' routine, it sets the security attribute to indicate that the category bitmap is present, even if it has not been allocated. This issue leads to a NULL pointer dereference issue while importing the same category bitmap into SELinux. This flaw allows a remote network user to crash the system kernel, resulting in a denial of service.
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?bfe6ac15
http://www.nessus.org/u?f758b3de
http://www.nessus.org/u?c935f269
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10711
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
https://security-tracker.debian.org/tracker/CVE-2020-10711
https://security.netapp.com/advisory/ntap-20200608-0001/
https://usn.ubuntu.com/4411-1/
https://usn.ubuntu.com/4412-1/
https://usn.ubuntu.com/4413-1/
https://usn.ubuntu.com/4414-1/
https://usn.ubuntu.com/4419-1/
https://www.debian.org/security/2020/dsa-4698
Plugin Details
Severity: Medium
ID: 288551
File Name: unity_linux_UTSA-2026-003851.nasl
Version: 1.2
Type: local
Published: 1/16/2026
Updated: 1/17/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: Medium
Base Score: 4.3
Temporal Score: 3.2
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P
CVSS Score Source: CVE-2020-10711
CVSS v3
Risk Factor: Medium
Base Score: 5.9
Temporal Score: 5.2
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/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 Ease: No known exploits are available
Patch Publication Date: 1/16/2026
Vulnerability Publication Date: 5/12/2020
Reference Information
CVE: CVE-2020-10711