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Alpine: xen: security update to 4.13.2-r5

medium Tenable Self-Hosted Container Security Plugin ID 407779

Description

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

 - An issue was discovered in Xen 4.9 through 4.14.x. On Arm, a guest is allowed to control whether memory
 accesses are bypassing the cache. This means that Xen needs to ensure that all writes (such as the ones
 during scrubbing) have reached the memory before handing over the page to a guest. Unfortunately, the
 operation to clean the cache is happening before checking if the page was scrubbed. Therefore there is no
 guarantee when all the writes will reach the memory. (CVE-2021-26933)

See Also

https://security.alpinelinux.org/vuln/CVE-2021-26933

Plugin Details

Severity: Medium

ID: 407779

Version: Revision 1.25

Type: Local

Published: 10/31/2023

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

CVSS Score Source: CVE-2021-26933

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:H/I:N/A:N

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

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 2/16/2021

Reference Information

CVE: CVE-2021-26933

IAVB: 2021-B-0011-S