Detections
Analytics
Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: expat (UTSA-2026-142300)
high Nessus Plugin ID 370111
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-2026-142300 advisory.libexpat before commit 13c5f63 contains a heap buffer over-read vulnerability in xmlparse.c.
XML_ParseBuffer advances the parse buffer end with parser->m_bufferEnd += len using a caller-supplied length that is not validated against the allocated buffer size, so repeated XML_ParseBuffer calls move m_bufferEnd past the end of the heap allocation and subsequent parsing reads out of bounds. Reaching this path requires a parse buffer to already be present; otherwise XML_ParseBuffer returns XML_ERROR_NO_BUFFER.
A buffer is present after a prior call to XML_GetBuffer, either directly (the common case) or indirectly through a prior XML_Parse call that allocates the buffer internally. The over-read discloses adjacent heap memory to the calling application, recovering heap pointers, libc function pointers, and code pointers sufficient to defeat ASLR and build further exploitation primitives.
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 expat package.See Also
https://atomgit.com/src-openeuler/expat/issues/85
Plugin Details
Severity: High
ID: 370111
File Name: unity_linux_UTSA-2026-142300.nasl
Version: 1.1
Type: Local
Published: 10/21/2026
Updated: 10/21/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.5
Percentile: 51.52
CVSS v2
Risk Factor: High
Base Score: 8.5
Temporal Score: 6.3
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:P
CVSS Score Source: CVE-2026-77214
CVSS v3
Risk Factor: High
Base Score: 8.2
Temporal Score: 7.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: High
Base Score: 8.3
Threat Score: 4.8
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N
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: 10/21/2026
Vulnerability Publication Date: 10/7/2026
Reference Information
CVE: CVE-2026-77214