Description
A NULL pointer dereference vulnerability in the Qt Framework QDomDocument::setContent() XML parsing path of the Qt XML module (qtbase).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The Qt Company | Qt | 6.9.0 <6.11.3 | — |
| The Qt Company | Qt | 4.1.0 <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-base +1 | No fix yet | — |
| Ubuntu 26.04 LTS | qt6-base +1 | No fix yet | — |
| Ubuntu 24.04 LTS | qt6-base | No fix yet | — |
| Ubuntu 22.04 LTS | qt6-base | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 | — |
Advisories 1
- WID-SEC-2026-4462 QT: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Nov 11, 2026