# CVE-2021-40563: gpac: A Segmentation fault exists casued by null pointer dereference exists in Gpac through 1.0.1 via the naludmx_create_av...

CVE-2021-40563 is fixed in gpac on 1 platform by DEBIAN-CVE-2021-40563 (version 1.0.1+dfsg1-4+deb11u2), released January 12, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-40563
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0092
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 12, 2022

## Description

A Segmentation fault exists casued by null pointer dereference exists in Gpac through 1.0.1 via the naludmx_create_avc_decoder_config function in reframe_nalu.c when using mp4box, which causes a denial of service.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | gpac Debian 11.6 (bullseye) | 1.0.1+dfsg1-4+deb11u2 | [DEBIAN-CVE-2021-40563](https://patchblox.com/security/data/fix/linux/debian-cve-2021-40563.md) | Jan 12, 2022 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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