CVE-2026-105923: CWE-476 NULL Pointer Dereference in qt Qt
Description
CVE-2026-105923 is a medium severity vulnerability in Qt where a malicious SVG can cause an integer overflow leading to a null-pointer dereference in the VectorImage QML Type. This can result in application crashes or denial of service. The affected versions are Qt 6.8.0 through 6.8.8 and 6.9.0 through 6.11.2. No official patch information is provided, and no known exploits are reported in the wild.
CVSS v4.0
Score 4.0medium
Affected software
qt
Qt
pkg:github/qt/qtbasecpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer overflow triggered by a malicious SVG file, which subsequently causes a null-pointer dereference in the VectorImage QML Type component of Qt. The flaw is identified as CWE-476 (NULL Pointer Dereference) and CWE-190 (Integer Overflow or Wraparound). It affects Qt versions >=6.8.0 <6.8.9 and >=6.9.0 <6.11.3. The CVSS 4.0 base score is 4.0, indicating medium severity, with local attack vector, low complexity, no privileges required, and user interaction needed. No vendor advisory or patch links are provided, and no known exploitation is reported.
Potential Impact
Successful exploitation can cause a null-pointer dereference leading to application crashes or denial of service. There is no indication of code execution or data breach. The attack requires local access and user interaction, limiting the scope of impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted SVG files in affected Qt versions. Monitor vendor channels for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Qt
- Date Reserved
- 2026-10-06T06:07:06.587Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad8870e2cdf04f656d9bfed
Added to database: 10/21/2026, 09:34:06 UTC
Last enriched: 10/21/2026, 09:48:41 UTC
Last updated: 10/21/2026, 09:49:03 UTC
Views: 9
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.