CVE-2025-11234

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2025-10-03. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
51.9%
KEV
Not listed

Published

October 3, 2025

Last Modified

June 1, 2026

References (12)

Vendor Advisories for CVE-2025-11234(5)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(10)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuqemu-utils (1:10.1.0+ds-5ubuntu2.4) @ questing2026-05-21ubuntu
redhatqemu-kvm-17:10.1.0-17.el9_82026-05-19redhat
redhatvirt:rhel-8100020251202222937.489197e62026-03-24redhat
redhatqemu-kvm-17:8.2.0-11.el9_4.192026-02-24redhat
redhatqemu-kvm-17:7.2.0-14.el9_2.242026-02-23redhat
redhatqemu-kvm-18:10.0.0-14.el10_1.52026-02-05redhat
redhatrhcos-417.94.202601120213-02026-01-22redhat
redhatrhcos-418.94.202601071817-02026-01-15redhat
redhatrhcos-416.94.202601071926-02026-01-15redhat
redhatqemu-kvm-17:8.2.0-11.el9_4.182025-12-17redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(7)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 110 total refreshes for this CVE.

  1. 2026-07-16 17:02 UTCEPSS rescore
  2. 2026-07-16 17:02 UTCEPSS rescore
  3. 2026-07-15 16:57 UTCEPSS rescore
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  13. 2026-07-10 04:54 UTCOSV refresh
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  24. 2026-07-02 17:00 UTCEPSS rescore
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  1. 2026-06-30 23:21 UTCEPSS rescore
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  21. 2026-06-17 17:52 UTCEPSS rescore
  22. 2026-06-16 17:52 UTCEPSS rescore
  23. 2026-06-15 17:48 UTCEPSS rescore
  24. 2026-06-15 17:48 UTCEPSS rescore
  25. 2026-06-14 23:17 UTCEPSS rescore
  26. 2026-06-13 22:59 UTCEPSS rescore
  27. 2026-06-12 23:11 UTCEPSS rescore
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  29. 2026-06-11 13:59 UTCEPSS rescore
  30. 2026-06-10 22:18 UTCEPSS rescore
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  36. 2026-06-07 15:24 UTCEPSS rescore
  37. 2026-06-06 13:47 UTCEPSS rescore
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  45. 2026-06-02 20:12 UTCEPSS rescore
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  49. 2026-05-31 22:30 UTCEPSS rescore
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  71. 2026-05-21 22:42 UTCEPSS rescore
  72. 2026-05-21 07:00 UTCEG score recompute
  73. 2026-05-21 07:00 UTCVendor advisory
  74. 2026-05-21 07:00 UTCGHSA enrichment
  75. 2026-05-20 22:37 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-11234?
CVE-2025-11234 is a high vulnerability published on October 3, 2025. 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…
When was CVE-2025-11234 disclosed?
CVE-2025-11234 was first published in the National Vulnerability Database on October 3, 2025, with the most recent update on June 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-11234 actively exploited?
CVE-2025-11234 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 51.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-11234?
CVE-2025-11234 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2025-11234?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-11234, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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