Alpine: multiple xen packages: security update to 4.15.0-r2 (deprecated)

high Tenable Cloud Security Plugin ID 400123

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

- Another race in XENMAPSPACE_grant_table handling Guests are permitted access to certain Xen-owned pages of
memory. The majority of such pages remain allocated / associated with a guest for its entire lifetime.
Grant table v2 status pages, however, are de-allocated when a guest switches (back) from v2 to v1. Freeing
such pages requires that the hypervisor enforce that no parallel request can result in the addition of a
mapping of such a page to a guest. That enforcement was missing, allowing guests to retain access to pages
that were freed and perhaps re-used for other purposes. Unfortunately, when XSA-379 was being prepared,
this similar issue was not noticed. (CVE-2021-28701)

Plugin Details

Severity: High

ID: 400123

Version: Revision 1.28

Type: Local

Family: Alpine Linux Local Security Checks

Published: 8/16/2023

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 95.11

CVSS v2

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.3

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

CVSS Score Source: CVE-2021-28701

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/8/2021

Vulnerability Publication Date: 9/8/2021

Reference Information

CVE: CVE-2021-28701

Detections

Analytics