CVE-2025-11234
Qemu-kvm: vnc websocket handshake use-after-free
Description
A flaw was found in QEMU. If the QIOChannelWebsock object is freed while it is waiting to complete a handshake, a GSource is leaked. This can lead to the callback firing later on and triggering a use-after-free in the use of the channel. This can be abused by a malicious client with network access to the VNC WebSocket port to cause a denial of service during the WebSocket handshake prior to the VNC client authentication.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:NConfidentialityNone
I:NIntegrityNone
A:HAvailabilityHigh
Weaknesses
Affected Products
Red Hat
commercial·US
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Fabrice Bellard
individual-dev·FR
and 10 more affected products View all →
Exploitability
Official Patch Available
Attack Graph
Products CVE Techniques Tactics
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MITRE ATT&CK
2 techniques Initial Access
Privilege Escalation
References
https://access.redhat.com/errata/RHSA-2025:23228
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:0326
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:0332
access.redhat.com
and 16 more references View all →
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