# DLA-4387-1: qtbase-opensource-src security update

DLA-4387-1, released November 29, 2025, fixes 1 CVE in qtbase-opensource-src (version 5.15.2+dfsg-9+deb11u2). None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/dla-4387-1
- Platform: Linux
- Released: Nov 29, 2025
- Priority: High (Closes CVE-2024-39936, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2024-39936

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [qtbase-opensource-src](https://patchblox.com/security/data/product/linux/qtbase-opensource-src.md) | Debian 11.6 (bullseye) | 5.15.2+dfsg-9+deb11u2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2024-39936](https://patchblox.com/security/data/cve/CVE-2024-39936.md) | High | libqt5-qtbase: This update for libqt5-qtbase fixes the following issues:  - CVE-2023-45935: Fixed NULL pointer dereference in QXcbCo... | 8.6 | 0.0049 |  |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo