# CVE-2021-45831: gpac: A Null Pointer Dereference vulnerability exitgs in GPAC 1.0.1 in MP4Box via __strlen_avx2, which causes a Denial of S...

CVE-2021-45831 is fixed in gpac on 1 platform by DEBIAN-CVE-2021-45831 (version 1.0.1+dfsg1-4+deb11u2), released January 5, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-45831
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0064
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 5, 2022

## Description

A Null Pointer Dereference vulnerability exitgs in GPAC 1.0.1 in MP4Box via __strlen_avx2, 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-2021-45831](https://patchblox.com/security/data/fix/linux/debian-cve-2021-45831.md) | Jan 5, 2022 |

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Data as of 2026-11-08T13:06:02Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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