Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The Qt Company | Qt | 6.9.0 <6.11.3 | — |
| The Qt Company | Qt | 5.0.0 <6.8.9 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | qt6-5compat +2 | No fix yet | — |
| Ubuntu 26.04 LTS | qt6-5compat +2 | No fix yet | — |
| Ubuntu 24.04 LTS | qt6-5compat +1 | No fix yet | — |
| Ubuntu 22.04 LTS | qt6-5compat +1 | No fix yet | — |
| Ubuntu 20.04 LTS | qtbase-opensource-src-gles | No fix yet | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | qtbase-opensource-src-gles | No fix yet | — |
| Ubuntu Pro 24.04 LTS | qtbase-opensource-src | No fix yet | — |
| Ubuntu Pro 22.04 LTS | qtbase-opensource-src | No fix yet | — |
| Ubuntu Pro 20.04 LTS | qtbase-opensource-src | No fix yet | — |
| Ubuntu Pro 18.04 LTS | qtbase-opensource-src | No fix yet | — |
| Ubuntu Pro 16.04 LTS | qtbase-opensource-src | No fix yet | — |