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Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987285)

medium Nessus Plugin ID 268654

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-2025-987285 advisory.

 In the Linux kernel, the following vulnerability has been resolved:

 perf/x86/intel/pt: Fix crash with stop filters in single-range mode

 Add a check for !buf->single before calling pt_buffer_region_size in a place where a missing check can cause a kernel crash.

 Fixes a bug introduced by commit 670638477aed (perf/x86/intel/pt:
 Opportunistically use single range output mode), which added a support for PT single-range output mode. Since that commit if a PT stop filter range is hit while tracing, the kernel will crash because of a null pointer dereference in pt_handle_status due to calling pt_buffer_region_size without a ToPA configured.

 The commit which introduced single-range mode guarded almost all uses of the ToPA buffer variables with checks of the buf->single variable, but missed the case where tracing was stopped by the PT hardware, which happens when execution hits a configured stop filter.

 Tested that hitting a stop filter while PT recording successfully records a trace with this patch but crashes without this patch.

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?b354c947

http://www.nessus.org/u?08b80d71

https://nvd.nist.gov/vuln/detail/CVE-2022-48713

Plugin Details

Severity: Medium

ID: 268654

File Name: unity_linux_UTSA-2025-987285.nasl

Version: 1.2

Type: local

Published: 10/7/2025

Updated: 10/15/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

CVSS Score Source: CVE-2022-48713

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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: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: 3/8/2022

Reference Information

CVE: CVE-2022-48713