NULL pointer dereference in Qemu
CVE-2023-3354
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.
EPSS: 0.016 (74.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Patch, Issue Tracking)
- secalert@redhat.com (Mailing List)
- secalert@redhat.com
Frequently asked questions
- What is CVE-2023-3354?
- CVE-2023-3354 is a high-severity vulnerability in Qemu, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2023-07-11.
- How severe is CVE-2023-3354?
- High severity. CVSS v3 base score is 7.5 out of 10.