# CVE-2020-28928: musl: In musl libc through 1.2.1, wcsnrtombs mishandles particular combinations of destination buffer size and source chara...

CVE-2020-28928 is fixed in 2 products on 1 platform, first by musl 1.1.19-1ubuntu0.1~esm1, released November 24, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-28928
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0065
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 24, 2020

## Description

In musl libc through 1.2.1, wcsnrtombs mishandles particular combinations of destination buffer size and source character limit, as demonstrated by an invalid write access (buffer overflow).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | musl Ubuntu 18.04.6 LTS (bionic) | 1.1.19-1ubuntu0.1~esm1 | [musl 1.1.19-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-musl-1.1.19-1ubuntu0.1-esm1.md) | Nov 24, 2020 |
| Linux | musl Ubuntu 20.04 LTS (focal) | 1.1.24-1ubuntu0.1~esm1 | [musl 1.1.24-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-musl-1.1.24-1ubuntu0.1-esm1.md) | Nov 24, 2020 |
| Linux | musl-tools Ubuntu 18.04.6 LTS (bionic) | 1.1.19-1ubuntu0.1~esm1 | [musl-tools 1.1.19-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-musl-tools-1.1.19-1ubuntu0.1-esm1.md) | Nov 24, 2020 |
| Linux | musl-tools Ubuntu 20.04 LTS (focal) | 1.1.24-1ubuntu0.1~esm1 | [musl-tools 1.1.24-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-musl-tools-1.1.24-1ubuntu0.1-esm1.md) | Nov 24, 2020 |

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