Detections
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Amazon Linux 2023 : qemu, qemu-common, qemu-guest-agent (ALAS2023-2026-3442)
high Nessus Plugin ID 379835
Synopsis
The remote Amazon Linux 2023 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3442 advisory.A flaw was found in QEMU's websocket I/O channel (QIOChannelWebsock in io/channel-websock.c). The websocket server reads encoded data from a connected client into an input buffer and decodes it into a separate buffer, but the size limit is enforced only on the encoded-input buffer and not on the decoded- input buffer. A client that connects to a QEMU websocket endpoint such as a VNC server or a character-device socket backend configured with websocket=on and sends data that is not consumed can cause the decoded-input buffer to grow without bound, exhausting host memory and leading to a denial of service. (CVE-2026-101291)
hw/usb/hcd-xhci: More reentrancy guard fixes for the XHCI code (CVE-2026-111819)
A use-after-free flaw was found in the OHCI USB host controller emulation (hw/usb/hcd-ohci.c) in QEMU.
When an isochronous transfer descriptor is directed at a non-isochronous endpoint, ohci_service_iso_td() can free a heap-allocated USBPacket while a pending asynchronous transfer still holds a reference to it;
that reference is later dereferenced when the transfer completes. A malicious guest able to program the emulated OHCI controller can use this to crash the QEMU process on the host (denial of service) and potentially execute arbitrary code in the context of the QEMU process. The issue is fixed in QEMU 11.1.3 and 10.0.15. (CVE-2026-7180)
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 'dnf update qemu --releasever 2023.12.20261112' or or 'dnf update --advisory ALAS2023-2026-3442 --releasever 2023.12.20261112' to update your system.See Also
https://alas.aws.amazon.com//AL2023/ALAS2023-2026-3442.html
https://alas.aws.amazon.com/faqs.html
https://explore.alas.aws.amazon.com/CVE-2026-101291.html
Plugin Details
Severity: High
ID: 379835
File Name: al2023_ALAS2023-2026-3442.nasl
Version: 1.1
Type: Local
Agent: unix
Published: 11/12/2026
Updated: 11/12/2026
Supported Sensors: Nessus Agent, Continuous Assessment, Nessus
Risk Information
CVSS v2
Risk Factor: Low
Base Score: 2.1
Temporal Score: 1.6
Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P
CVSS Score Source: CVE-2026-7180
CVSS v3
Risk Factor: High
Base Score: 7.2
Temporal Score: 6.3
Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:qemu-common-debuginfo, p-cpe:/a:amazon:linux:qemu-common, p-cpe:/a:amazon:linux:qemu-debuginfo, p-cpe:/a:amazon:linux:qemu-debugsource, p-cpe:/a:amazon:linux:qemu-docs, p-cpe:/a:amazon:linux:qemu-guest-agent-debuginfo, p-cpe:/a:amazon:linux:qemu-guest-agent, p-cpe:/a:amazon:linux:qemu-img-debuginfo, p-cpe:/a:amazon:linux:qemu-img, p-cpe:/a:amazon:linux:qemu-kvm-core, p-cpe:/a:amazon:linux:qemu-kvm, p-cpe:/a:amazon:linux:qemu-pr-helper-debuginfo, p-cpe:/a:amazon:linux:qemu-pr-helper, p-cpe:/a:amazon:linux:qemu-system-aarch64-core-debuginfo, p-cpe:/a:amazon:linux:qemu-system-aarch64-core, p-cpe:/a:amazon:linux:qemu-system-aarch64, p-cpe:/a:amazon:linux:qemu-system-x86-core-debuginfo, p-cpe:/a:amazon:linux:qemu-system-x86-core, p-cpe:/a:amazon:linux:qemu-system-x86, p-cpe:/a:amazon:linux:qemu-tests-debuginfo, p-cpe:/a:amazon:linux:qemu-tests, p-cpe:/a:amazon:linux:qemu-tools-debuginfo, p-cpe:/a:amazon:linux:qemu-tools, p-cpe:/a:amazon:linux:qemu-user-binfmt, p-cpe:/a:amazon:linux:qemu-user-debuginfo, p-cpe:/a:amazon:linux:qemu-user-static-aarch64-debuginfo, p-cpe:/a:amazon:linux:qemu-user-static-aarch64, p-cpe:/a:amazon:linux:qemu-user-static-x86-debuginfo, p-cpe:/a:amazon:linux:qemu-user-static-x86, p-cpe:/a:amazon:linux:qemu-user-static, p-cpe:/a:amazon:linux:qemu-user, p-cpe:/a:amazon:linux:qemu
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 11/12/2026
Vulnerability Publication Date: 11/12/2026