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SRC: CVELISTV5 / SYNC: T-0M / LAG: 19M / REC: 386,690 / REV: C6-1C / V4

01 RecordSTATE: PUBLISHED

CVE-2025-11234

Qemu-kvm: vnc websocket handshake use-after-free

HighPUBLISHEDCNA: redhat

CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

02 Description

CNA: redhat

Qemu-kvm: vnc websocket handshake use-after-free

03 Exploitation and scoring

SRC: CISA, FIRST, NVD, RED HAT

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.83% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 55.2% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Deferred. NVD last modified this record on 2026-09-03.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

SCHEMA: 5.2

Published

2025-10-03 10:30Z11 MO AGO

Last updated

2026-09-03 12:02Z1 DAY AGO

Reserved

2025-10-01

Assigning CNA

redhat

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

CWE-416Use After FreeVariant

Data version

5.2

Document digest

560aae7cc4334009414bddabfc53a4b54af2cb52500e1a996e299c51174d4273

05 Affected products

PAIRS: 13

VendorProductVersionsPlatforms

Red HatRed Hat Enterprise Linux 10Not specified—

Red HatRed Hat Enterprise Linux 8Not specified—

Red HatRed Hat Enterprise Linux 9Not specified—

Red HatRed Hat Enterprise Linux 9.0 Update Services for SAP SolutionsNot specified—

Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP SolutionsNot specified—

Red HatRed Hat Enterprise Linux 9.4 Extended Update SupportNot specified—

Red HatRed Hat OpenShift Container Platform 4.12Not specified—

Red HatRed Hat OpenShift Container Platform 4.16Not specified—

Red HatRed Hat OpenShift Container Platform 4.17Not specified—

Red HatRed Hat OpenShift Container Platform 4.18Not specified—

Red HatRed Hat Enterprise Linux 6Not specified—

Red HatRed Hat Enterprise Linux 7Not specified—

Red HatRed Hat OpenShift Container Platform 4Not specified—

06 References

REFS: 13

access.redhat.comRHSA-2025:23228https://access.redhat.com/errata/RHSA-2025:23228vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:0326https://access.redhat.com/errata/RHSA-2026:0326vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:0332https://access.redhat.com/errata/RHSA-2026:0332vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:0702https://access.redhat.com/errata/RHSA-2026:0702vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:1831https://access.redhat.com/errata/RHSA-2026:1831vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:18772https://access.redhat.com/errata/RHSA-2026:18772vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:22147https://access.redhat.com/errata/RHSA-2026:22147vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:3077https://access.redhat.com/errata/RHSA-2026:3077vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:3165https://access.redhat.com/errata/RHSA-2026:3165vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:5578https://access.redhat.com/errata/RHSA-2026:5578vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:59831https://access.redhat.com/errata/RHSA-2026:59831vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/security/cve/CVE-2025-11234vdb-entryx_refsource_REDHAT
bugzilla.redhat.comRHBZ#2401209https://bugzilla.redhat.com/show_bug.cgi?id=2401209issue-trackingx_refsource_REDHAT