# CVE-2021-24032: libzstd1: Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix forCVE-2021-24031, the Zstandard command-line utili...

CVE-2021-24032 is fixed in 2 products on 1 platform, first by libzstd1 1.3.3+dfsg-2ubuntu1.2, released February 19, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-24032
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0035
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 19, 2021

## Description

Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix forCVE-2021-24031, the Zstandard command-line utility created output fileswith default permissions and restricted those permissions immediatelyafterwards. Output files could therefore momentarily be readable orwritable to unintended parties.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libzstd1 Ubuntu 18.04.6 LTS (bionic) | 1.3.3+dfsg-2ubuntu1.2 | [libzstd1 1.3.3+dfsg-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libzstd1-1.3.3-dfsg-2ubuntu1.2.md) | Feb 19, 2021 |
| Linux | libzstd1 Ubuntu 20.04 LTS (focal) | 1.4.4+dfsg-3ubuntu0.1 | [libzstd1 1.4.4+dfsg-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libzstd1-1.4.4-dfsg-3ubuntu0.1.md) | Feb 19, 2021 |
| Linux | libzstd1 Ubuntu 24.10 (oracular) | 1.4.8+dfsg-2build1 | [libzstd1 1.4.8+dfsg-2build1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libzstd1-1.4.8-dfsg-2build1.md) | Jan 16, 2026 |
| Linux | libzstd1 Ubuntu 25.04 (plucky) | 1.4.8+dfsg-2build1 | [libzstd1 1.4.8+dfsg-2build1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libzstd1-1.4.8-dfsg-2build1.md) | Jan 16, 2026 |
| Linux | zstd Ubuntu 18.04.6 LTS (bionic) | 1.3.3+dfsg-2ubuntu1.2 | [zstd 1.3.3+dfsg-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-zstd-1.3.3-dfsg-2ubuntu1.2.md) | Feb 19, 2021 |
| Linux | zstd Ubuntu 20.04 LTS (focal) | 1.4.4+dfsg-3ubuntu0.1 | [zstd 1.4.4+dfsg-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-zstd-1.4.4-dfsg-3ubuntu0.1.md) | Feb 19, 2021 |
| Linux | zstd Ubuntu 24.10 (oracular) | 1.4.8+dfsg-2build1 | [zstd 1.4.8+dfsg-2build1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-zstd-1.4.8-dfsg-2build1.md) | Jan 16, 2026 |
| Linux | zstd Ubuntu 25.04 (plucky) | 1.4.8+dfsg-2build1 | [zstd 1.4.8+dfsg-2build1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-zstd-1.4.8-dfsg-2build1.md) | Jan 16, 2026 |

---

Data as of 2026-11-08T19:12:23Z 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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.