# CVE-2019-1010305: libmspack0t64: libmspack 0.9.1alpha is affected by: Buffer Overflow

CVE-2019-1010305 is fixed in 4 products on 1 platform, first by libmspack0 0.6-3ubuntu0.3, released July 14, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-1010305
- Priority: Routine
- CVSS: 5.5 (Medium)
- EPSS: 0.0146
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 14, 2019

## Description

libmspack 0.9.1alpha is affected by: Buffer Overflow. The impact is:Information Disclosure. The component is: function chmd_read_headers() inlibmspack(file libmspack/mspack/chmd.c). The attack vector is: the victimmust open a specially crafted chm file. The fixed version is: after commit2f084136cfe0d05e5bf5703f3e83c6d955234b4d.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libmspack RHEL 8 | 0:0.7-0.3.alpha.el8.4 | [RHSA-2020:1686](https://patchblox.com/security/data/fix/linux/rhsa-2020-1686.md) | Apr 28, 2020 |
| Linux | libmspack ol 8 | 0:0.7-0.3.alpha.el8.4 | [ELSA-2020-1686](https://patchblox.com/security/data/fix/linux/elsa-2020-1686.md) | May 5, 2020 |
| Linux | libmspack-devel RHEL 8 | 0:0.7-0.3.alpha.el8.4 | [RHSA-2020:1686](https://patchblox.com/security/data/fix/linux/rhsa-2020-1686.md) | Apr 28, 2020 |
| Linux | libmspack-devel ol 8 | 0:0.7-0.3.alpha.el8.4 | [ELSA-2020-1686](https://patchblox.com/security/data/fix/linux/elsa-2020-1686.md) | May 5, 2020 |
| Linux | libmspack0 Ubuntu 18.04.6 LTS (bionic) | 0.6-3ubuntu0.3 | [libmspack0 0.6-3ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmspack0-0.6-3ubuntu0.3.md) | Jul 14, 2019 |
| Linux | libmspack0 Ubuntu 20.04 LTS (focal) | 0.10.1-1 | [libmspack0 0.10.1-1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmspack0-0.10.1-1.md) | Jul 14, 2019 |
| Linux | libmspack0t64 Ubuntu 24.10 (oracular) | 0.10.1-1 | [libmspack0t64 0.10.1-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libmspack0t64-0.10.1-1.md) | Jul 15, 2019 |
| Linux | libmspack0t64 Ubuntu 25.04 (plucky) | 0.10.1-1 | [libmspack0t64 0.10.1-1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libmspack0t64-0.10.1-1.md) | Jul 15, 2019 |

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Data as of 2026-11-08T00:53:09Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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