Description
encodeText in QDom in Qt before 6.8.0 has a complex algorithm involving XML string copy and inline replacement of parts of a string (with relocation of later data).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Qt | Qt | < 5.15.19, 6.0.0 – < 6.5.9, 6.6.0 – < 6.8.0 | 5.15.19 |
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | qt6-base | 6.8.2+dfsg-5 | — |
| Debian 13 | qt6-base | 6.8.2+dfsg-5 | — |
| Debian 12 | qt6-base | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | qtbase-opensource-src +1 | No fix yet | — |
| Ubuntu 26.04 LTS | qtbase-opensource-src +1 | No fix yet | — |
| Ubuntu 25.10 | qtbase-opensource-src +1 | No fix yet | — |
| Ubuntu 24.04 LTS | qt6-base +2 | No fix yet | — |
| Ubuntu 22.04 LTS | qt6-base +2 | No fix yet | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | qtbase-opensource-src-gles | No fix yet | — |
| 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 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | libqt5-qtbase | 5.15.12+kde151-150600.3.9.1 | SUSE-SU-2025:3723-1 |
| SLES 15 SP7 | qt6-base +1 | 6.6.3-150600.3.6.1 | SUSE-SU-2025:03599-1 |
| SLES 15 SP6 | libqt5-qtbase | 5.15.12+kde151-150600.3.9.1 | SUSE-SU-2025:3723-1 |
| SLES 15 SP6 | qt6-base +1 | 6.6.3-150600.3.6.1 | SUSE-SU-2025:03599-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | libqt5-qtbase | 5.15.12+kde151-150600.3.9.1 | SUSE-SU-2025:3723-1 |
| openSUSE Leap 15.6 | qt6-base +1 | 6.6.3-150600.3.6.1 | SUSE-SU-2025:03599-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | qtbase | 6.6.3-3 | — |
| Azure Linux 2 (CBL-Mariner) | qt5-qtbase | 5.12.11-16 | — |
Advisories 3
- SUSE-SU-2025:03599-1 Security update for qt6-base SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:3723-1 Security update for libqt5-qtbase SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-0628 QT: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Oct 22, 2025