# CVE-2026-42798: lcms2: Little CMS (lcms2) 2.16 through 2.18 before 2.19 has an integer overflow in ParseCube in cmscgats.c.

CVE-2026-42798 is fixed in 8 products on 1 platform, first by liblcms2-2 2.17-1ubuntu0.2, released May 4, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-42798
- Priority: Routine
- CVSS: 4.0 (medium)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 30, 2026

## Description

Little CMS (lcms2) 2.16 through 2.18 before 2.19 has an integer overflow in ParseCube in cmscgats.c.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | lcms2 Debian 13.5 (trixie) | 2.16-2+deb13u2 | [DEBIAN-CVE-2026-42798](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42798.md) | May 15, 2026 |
| Linux | lcms2 Debian 14 | 2.19.1-1 | [DEBIAN-CVE-2026-42798](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42798.md) | May 15, 2026 |
| Linux | lcms2 amzn 2023 | 2.19-75.amzn2023.0.1 | [ALAS2023-2026-1657](https://patchblox.com/security/data/fix/linux/alas2023-2026-1657.md) | May 11, 2026 |
| Linux | lcms2 opensuse-leap 16.0 | 2.16-160000.4.1 | [OPENSUSE-SU-2026:21202-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21202-1.md) | Jul 1, 2026 |
| Linux | lcms2 sles 16.0 | 2.16-160000.4.1 | [SUSE-SU-2026:22506-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22506-1.md) | Jul 1, 2026 |
| Linux | lcms2-debuginfo amzn 2023 | 2.19-75.amzn2023.0.1 | [ALAS2023-2026-1657](https://patchblox.com/security/data/fix/linux/alas2023-2026-1657.md) | May 11, 2026 |
| Linux | lcms2-debugsource amzn 2023 | 2.19-75.amzn2023.0.1 | [ALAS2023-2026-1657](https://patchblox.com/security/data/fix/linux/alas2023-2026-1657.md) | May 11, 2026 |
| Linux | lcms2-devel amzn 2023 | 2.19-75.amzn2023.0.1 | [ALAS2023-2026-1657](https://patchblox.com/security/data/fix/linux/alas2023-2026-1657.md) | May 11, 2026 |
| Linux | lcms2-utils amzn 2023 | 2.19-75.amzn2023.0.1 | [ALAS2023-2026-1657](https://patchblox.com/security/data/fix/linux/alas2023-2026-1657.md) | May 11, 2026 |
| Linux | lcms2-utils-debuginfo amzn 2023 | 2.19-75.amzn2023.0.1 | [ALAS2023-2026-1657](https://patchblox.com/security/data/fix/linux/alas2023-2026-1657.md) | May 11, 2026 |
| Linux | liblcms2-2 Ubuntu 25.10 (questing) | 2.16-2ubuntu0.2 | [liblcms2-2 2.16-2ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-liblcms2-2-2.16-2ubuntu0.2.md) | May 15, 2026 |
| Linux | liblcms2-2 Ubuntu 26.04.1 LTS (resolute) | 2.17-1ubuntu0.2 | [liblcms2-2 2.17-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-liblcms2-2-2.17-1ubuntu0.2.md) | May 4, 2026 |
| Linux | liblcms2-utils Ubuntu 25.10 (questing) | 2.16-2ubuntu0.2 | [liblcms2-utils 2.16-2ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-liblcms2-utils-2.16-2ubuntu0.2.md) | May 15, 2026 |
| Linux | liblcms2-utils Ubuntu 26.04.1 LTS (resolute) | 2.17-1ubuntu0.2 | [liblcms2-utils 2.17-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-liblcms2-utils-2.17-1ubuntu0.2.md) | May 4, 2026 |

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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

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