Description
A malformed header in the binary file fed to QBinaryJson::fromBinaryData() can cause undefined behaviour because of out-of-bounds read.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| qt | qt | 5.0.0 – ≤ 6.8.8, 6.9.0 – ≤ 6.11.2 | — |
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 | qt6-5compat | 6.11.2-3 | — |
| Debian 14 | qtbase-opensource-src +1 | No fix yet | — |
| Debian 13 | qt6-5compat +2 | No fix yet | — |
| Debian 12 | qt6-5compat +2 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | qtbase-opensource-src-gles | No fix yet | — |
| Ubuntu 26.04 LTS | qtbase-opensource-src-gles | No fix yet | — |
| Ubuntu 24.04 LTS | qtbase-opensource-src-gles | No fix yet | — |
| Ubuntu 22.04 LTS | qtbase-opensource-src-gles | No fix yet | — |
| Ubuntu 20.04 LTS | qtbase-opensource-src-gles | No fix yet | — |
Show 1 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 | — |
Advisories 1
- WID-SEC-2026-4048 QT: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Oct 26, 2026
References
- Qt Wiki: List of known vulnerabilities in Qt products vendor-advisory
- dev patch 1 patch
- dev patch 2 patch