Description
A NULL pointer dereference vulnerability in the Qt QCborValue to JSON conversion of the Qt Core module.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| qt | Qt | 5.12.0 – ≤ 6.8.9, 6.9.0 – ≤ 6.11.2, 6.12.0 – < 6.12.1 | 6.12.1 |
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 | No fix yet | — |
| Debian 14 | qtbase-opensource-src | 5.15.19+dfsg-7 | — |
| Debian 13 | qt6-base +1 | No fix yet | — |
| Debian 12 | qt6-base +1 | No fix yet | — |
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 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | qt5-qtbase +11 | 5.15.18-6.2.hum1 | RHSA-2026:94640 |
| Red Hat Hardened Images 1 | qt6-qtbase +10 | 6.12.0-1.1.hum1 | RHSA-2026:94798 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qt6-base | 6.12.0-2.1 | openSUSE-SU-2026:12384-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | qtbase | No fix yet | — |
Advisories 4
- RHSA-2026:94798 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:94640 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- WID-SEC-2026-4253 QT: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Nov 3, 2026
- openSUSE-SU-2026:12384-1 libQt6Concurrent6-6.12.0-2.1 on GA media SUSE / openSUSE Security Updates · Nov 2, 2026