CVE-2025-5683Network attack vector

Application crash via invalid ICNS header validation

Published Jun 5, 2025 · Updated Jul 29, 2026

Denial of service in Qt Framework 6.3.0 through 6.5.9, 6.6.0 through 6.8.4, and 6.9.0 allows attackers to crash applications via ICNS files. QICNSHandler::scanDevice supplies a computed file bound to isBlockHeaderValid, whose qBound-based check can assert before validating the bound ordering. Reachability requires an application to load an attacker-supplied ICNS image through QImage or indirectly during QTextDocument rendering.

CVSS severity5.1
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Qt Framework 6.3.0 through 6.5.9, 6.6.0 through 6.8.4, and 6.9.0 allows attackers to crash applications via ICNS files. QICNSHandler::scanDevice supplies a computed file bound to isBlockHeaderValid, whose qBound-based check can assert before validating the bound ordering. Reachability requires an application to load an attacker-supplied ICNS image through QImage or indirectly during QTextDocument rendering.

The record

CVE
CVE-2025-5683
Published
Jun 5, 2025
Updated
Jul 29, 2026
Vendor
The Qt Company
Product
Qt Framework
Classifications
CWE-770, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.3.0 <=6.5.9
  2. Affected versionversion=6.6.0 <=6.8.4
  3. Affected versionversion=6.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Qt Company · Qt Frameworkversion=6.3.0 <=6.5.9; version=6.6.0 <=6.8.4; version=6.9.0

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
5.1The Qt CompanyCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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