Alpine: multiple xen packages: security update to 4.18.5-r2

critical Tenable Cloud Security Plugin ID 435227

Description

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

- [This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities
correspond to which CVE.] There are multiple issues related to the handling and accessing of guest memory
pages in the viridian code: 1. A NULL pointer dereference in the updating of the reference TSC area. This
is CVE-2025-27466. 2. A NULL pointer dereference by assuming the SIM page is mapped when a synthetic timer
message has to be delivered. This is CVE-2025-58142. 3. A race in the mapping of the reference TSC page,
where a guest can get Xen to free a page while still present in the guest physical to machine (p2m) page
tables. This is CVE-2025-58143. (CVE-2025-27466, CVE-2025-58142, CVE-2025-58143)

- [This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities
correspond to which CVE.] There are two issues related to the mapping of pages belonging to other domains:
For one, an assertion is wrong there, where the case actually needs handling. A NULL pointer de-reference
could result on a release build. This is CVE-2025-58144. And then the P2M lock isn't held until a page
reference was actually obtained (or the attempt to do so has failed). Otherwise the page can not only
change type, but even ownership in between, thus allowing domain boundaries to be violated. This is
CVE-2025-58145. (CVE-2025-58144, CVE-2025-58145)

Plugin Details

Severity: Critical

ID: 435227

Version: Revision 1.8

Type: Local

Family: Alpine Linux Local Security Checks

Published: 9/9/2025

Updated: 7/2/2026

Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.58

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2025-58143

Vulnerability Information

Exploit Ease: No known exploits are available

Reference Information

CVE: CVE-2025-27466, CVE-2025-58142, CVE-2025-58143, CVE-2025-58144, CVE-2025-58145

Detections

Analytics