Improper i/o watch removal in tls handshake can lead to remote unauthenticated denial of service
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 1.6%
exploitation probability
1.6%top 26% of all CVEs
observed exploitation
nono source reports it
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Fedora · Extra Packages for Enterprise LinuxFedora · Fedoran/a · qemuRed Hat · Red Hat Enterprise Linux 6Red Hat · Red Hat Enterprise Linux 7Red Hat · Red Hat Enterprise Linux 8Red Hat · Red Hat Enterprise Linux 8 Advanced VirtualizationRed Hat · Red Hat Enterprise Linux 9Red Hat · Red Hat OpenStack Platform 13 (Queens)References
https://access.redhat.com/security/cve/CVE-2023-3354https://bugzilla.redhat.com/show_bug.cgi?id=2216478https://lists.debian.org/debian-lts-announce/2024/03/msg00012.htmlhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MURWGXDIF2WTDXV36T6HFJDBL632AO7R/