Detections
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Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987026)
high Nessus Plugin ID 268455
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-2025-987026 advisory.In the Linux kernel, the following vulnerability has been resolved:
ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions
While running the self-tests on a KASAN enabled kernel, I observed a slab-out-of-bounds splat very similar to the one reported in commit 821bbf79fe46 (ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions).
We additionally need to take care of fib6_metrics initialization failure when the caller provides an nh.
The fix is similar, explicitly free the route instead of calling fib6_info_release on a half-initialized object.
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?59be72c5
Plugin Details
Severity: High
ID: 268455
File Name: unity_linux_UTSA-2025-987026.nasl
Version: 1.2
Type: local
Published: 10/7/2025
Updated: 10/15/2025
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.2
CVSS v2
Risk Factor: Medium
Base Score: 6.2
Temporal Score: 4.6
Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:N/A:C
CVSS Score Source: CVE-2021-47291
CVSS v3
Risk Factor: High
Base Score: 7.1
Temporal Score: 6.2
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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/cpu, Host/UOS-Server/release, Host/UOS-Server/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 9/23/2025
Vulnerability Publication Date: 1/28/2022
Reference Information
CVE: CVE-2021-47291