cve/2024/CVE-2024-56431.md

### [CVE-2024-56431](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-56431)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)

### Description

oc_huff_tree_unpack in huffdec.c in libtheora in Theora through 1.0 7180717 has an invalid negative left shift. NOTE: this is disputed by third parties because there is no evidence of a security impact, e.g., an application would not crash.

### POC

#### Reference
- http://www.openwall.com/lists/oss-security/2025/04/25/4
- http://www.openwall.com/lists/oss-security/2025/04/25/6
- https://github.com/UnionTech-Software/libtheora-CVE-2024-56431-PoC
- https://www.openwall.com/lists/oss-security/2025/04/25/6

#### Github
- https://github.com/11notes/docker-paperless-ngx
- https://github.com/UnionTech-Software/libtheora-CVE-2024-56431-PoC
- https://github.com/fkie-cad/nvd-json-data-feeds