CVE-2025-11234
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- CVE-2025-11234
CVE Details
| Release Date: | 2025-10-03 | |
| Impact: | Moderate | What is this? |
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.
See more information about CVE-2025-11234 from MITRE CVE dictionary and NIST NVD
NOTE: The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 metrics
| Base Score: | 7.5 |
| Vector String: | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Version: | 3.1 |
| Attack Vector: | Network |
| Attack Complexity: | Low |
| Privileges Required: | None |
| User Interaction: | None |
| Scope: | Unchanged |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | High |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 10 (qemu-kvm) | ELSA-2026-1831 | 2026-02-04 |
| Oracle Linux version 8 (hivex) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (libguestfs) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (libguestfs-winsupport) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (libiscsi) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (libnbd) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (libtpms) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (libvirt) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (libvirt-dbus) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (libvirt-python) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (nbdkit) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (netcf) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (perl-Sys-Virt) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (qemu-kvm) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (seabios) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (sgabios) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (supermin) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (swtpm) | ELSA-2026-50118 | 2026-02-19 |
| Oracle Linux version 8 (virt-v2v) | ELSA-2026-50118 | 2026-02-19 |
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