Detections
Analytics
Alpine: multiple xen packages: security update to 4.15.0-r3
high Tenable Self-Hosted Container Security Plugin ID 424667
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)
See Also
Plugin Details
Severity: High
ID: 424667
Version: Revision 1.9
Type: Local
Published: 4/4/2025
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
Vulnerability Publication Date: 9/8/2021
Reference Information
CVE: CVE-2021-28701