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Amazon Linux 2 : qemu, --advisory ALAS2-2025-3061 (ALAS-2025-3061)

high Nessus Plugin ID 274668

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of qemu installed on the remote host is prior to 3.1.0-8. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2025-3061 advisory.

 A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc() function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process. (CVE-2021-4206)

 A flaw was found in the vhost-vsock device of QEMU. In case of error, an invalid element was not detached from the virtqueue before freeing its memory, leading to memory leakage and other unexpected results.
 Affected QEMU versions <= 6.2.0. (CVE-2022-26354)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Run 'yum update qemu' or or 'yum update --advisory ALAS2-2025-3061' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2-2025-3061.html

https://alas.aws.amazon.com/faqs.html

https://explore.alas.aws.amazon.com/CVE-2021-4206.html

https://explore.alas.aws.amazon.com/CVE-2022-26354.html

Plugin Details

Severity: High

ID: 274668

File Name: al2_ALAS-2025-3061.nasl

Version: 1.1

Type: local

Agent: unix

Published: 11/11/2025

Updated: 11/11/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.6

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

CVSS Score Source: CVE-2021-4206

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.4

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

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

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:ivshmem-tools, p-cpe:/a:amazon:linux:qemu-kvm-core, p-cpe:/a:amazon:linux:qemu-user-binfmt, p-cpe:/a:amazon:linux:qemu-ui-sdl, p-cpe:/a:amazon:linux:qemu-common, p-cpe:/a:amazon:linux:qemu-block-rbd, p-cpe:/a:amazon:linux:qemu, p-cpe:/a:amazon:linux:qemu-audio-pa, p-cpe:/a:amazon:linux:qemu-guest-agent, p-cpe:/a:amazon:linux:qemu-debuginfo, p-cpe:/a:amazon:linux:qemu-system-aarch64-core, p-cpe:/a:amazon:linux:qemu-user, p-cpe:/a:amazon:linux:qemu-block-curl, p-cpe:/a:amazon:linux:qemu-system-x86-core, p-cpe:/a:amazon:linux:qemu-audio-sdl, p-cpe:/a:amazon:linux:qemu-img, p-cpe:/a:amazon:linux:qemu-ui-gtk, p-cpe:/a:amazon:linux:qemu-ui-curses, p-cpe:/a:amazon:linux:qemu-audio-alsa, p-cpe:/a:amazon:linux:qemu-system-aarch64, p-cpe:/a:amazon:linux:qemu-audio-oss, p-cpe:/a:amazon:linux:qemu-block-dmg, p-cpe:/a:amazon:linux:qemu-block-iscsi, p-cpe:/a:amazon:linux:qemu-kvm, p-cpe:/a:amazon:linux:qemu-user-static, p-cpe:/a:amazon:linux:qemu-block-nfs, p-cpe:/a:amazon:linux:qemu-block-ssh, p-cpe:/a:amazon:linux:qemu-system-x86

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/10/2025

Vulnerability Publication Date: 3/16/2022

Reference Information

CVE: CVE-2021-4206, CVE-2022-26354