NULL Pointer Dereference Affecting qemu-kvm-common package, versions <17:7.2.0-14.el9_2.5.alma.1


Severity

Recommended
0.0
high
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.09% (40th percentile)

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  • Snyk IDSNYK-ALMALINUX9-QEMUKVMCOMMON-5902554
  • published14 Sept 2023
  • disclosed19 Sept 2023

Introduced: 14 Sep 2023

CVE-2023-3354  (opens in a new tab)
CWE-476  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade AlmaLinux:9 qemu-kvm-common to version 17:7.2.0-14.el9_2.5.alma.1 or higher.
This issue was patched in ALSA-2023:5094.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-kvm-common package and not the qemu-kvm-common package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.

CVSS Scores

version 3.1