CVSS 4.0
1.1 lowCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/R:U/U:ClearCVE-2026-103645 Integer overflow vulnerability in QTextCodec fromUnicode() and toUnicode() impacts Qt
Low (1.1) in qt qt. EPSS 0.2% estimated probability of exploitation activity in the next 30 days.
On this page
An integer overflow vulnerability in the Qt QTextCodec fromUnicode() and toUnicode() functionality of the Qt 5 Core Compatibility APIs module (Qt 6) and the Qt Core module (Qt 5). Only builds where Qt is compiled with ICU support are affected.
Severity
- EPSS
- 0.2% estimated probability of exploitation activity in the next 30 days; 7th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CWEs
- CWE-190 Integer Overflow or Wraparound (Year 2038 problem, Y2K38, Y2038, Epochalypse)
CWE-835 Loop with Unreachable Exit Condition (Infinite Loop) - Published
- Assigned by
- Qt (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| qt | from 5.0.0 before 6.8.9 |
| qt | from 6.9.0 before 6.11.3 |
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Ubuntu | 16.04:LTS, 20.04:LTS | qtbase-opensource-src-gles | no fix listed | UBUNTU-CVE-2026-103645 |
| Ubuntu | 22.04:LTS, 24.04:LTS | qt6-5compat, qtbase-opensource-src-gles | no fix listed | UBUNTU-CVE-2026-103645 |
| Ubuntu | 26.04:LTS, 26.10 | qt6-5compat, qtbase-opensource-src, qtbase-opensource-src-gles | no fix listed | UBUNTU-CVE-2026-103645 |
| Ubuntu | Pro:16.04:LTS, Pro:18.04:LTS, Pro:20.04:LTS and 2 more | qtbase-opensource-src | no fix listed | UBUNTU-CVE-2026-103645 |
From the distributions' data via OSV.dev: Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Ubuntu.
Attack patterns (CAPEC)
- CAPEC-92 Forced Integer Overflow Likelihood: High · Severity: High
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.