# CVE-2026-46675: libpng1.6 vulnerability

CVE-2026-46675 is fixed in 5 products on 1 platform, first by libpng-tools 1.6.57-1ubuntu0.1, released September 28, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-46675
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: n/a
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 28, 2026

## Description

[Use-after-free of zlib input in `png_read_end` after incomplete zTXt, iTXt or iCCP decompression]

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libpng-tools Ubuntu 18.04.6 LTS (bionic) | 1.6.34-1ubuntu0.18.04.2+esm4 | [libpng-tools 1.6.34-1ubuntu0.18.04.2+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpng-tools-1.6.34-1ubuntu0.18.04.2-esm4.md) | Oct 9, 2026 |
| Linux | libpng-tools Ubuntu 20.04 LTS (focal) | 1.6.37-2ubuntu0.1~esm4 | [libpng-tools 1.6.37-2ubuntu0.1~esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpng-tools-1.6.37-2ubuntu0.1-esm4.md) | Oct 9, 2026 |
| Linux | libpng-tools Ubuntu 22.04.1 LTS (jammy) | 1.6.37-3ubuntu0.7 | [libpng-tools 1.6.37-3ubuntu0.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpng-tools-1.6.37-3ubuntu0.7.md) | Oct 9, 2026 |
| Linux | libpng-tools Ubuntu 24.04.5 LTS (noble) | 1.6.43-5ubuntu0.7 | [libpng-tools 1.6.43-5ubuntu0.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libpng-tools-1.6.43-5ubuntu0.7.md) | Oct 9, 2026 |
| Linux | libpng-tools Ubuntu 26.04.1 LTS (resolute) | 1.6.57-1ubuntu0.1 | [libpng-tools 1.6.57-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libpng-tools-1.6.57-1ubuntu0.1.md) | Sep 28, 2026 |
| Linux | libpng1.6 Debian 12.15 (bookworm) | 1.6.39-2+deb12u6 | [DEBIAN-CVE-2026-46675](https://patchblox.com/security/data/fix/linux/debian-cve-2026-46675.md) | Oct 1, 2026 |
| Linux | libpng1.6 Debian 13.5 (trixie) | 1.6.48-1+deb13u6 | [DEBIAN-CVE-2026-46675](https://patchblox.com/security/data/fix/linux/debian-cve-2026-46675.md) | Oct 1, 2026 |
| Linux | libpng1.6 Debian 14 | 1.6.59-1 | [DEBIAN-CVE-2026-46675](https://patchblox.com/security/data/fix/linux/debian-cve-2026-46675.md) | Oct 1, 2026 |
| Linux | libpng16 opensuse-leap 16.0 | 1.6.59-160000.1.1 | [OPENSUSE-SU-2026:22084-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22084-1.md) | Nov 7, 2026 |
| Linux | libpng16 sles 15.7 | 1.6.59-150600.3.26.1 | [SUSE-SU-2026:4796-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4796-1.md) | Nov 7, 2026 |
| Linux | libpng16 sles 16.0 | 1.6.59-160000.1.1 | [SUSE-SU-2026:24228-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24228-1.md) | Nov 7, 2026 |
| Linux | libpng16-16 Ubuntu 18.04.6 LTS (bionic) | 1.6.34-1ubuntu0.18.04.2+esm4 | [libpng16-16 1.6.34-1ubuntu0.18.04.2+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpng16-16-1.6.34-1ubuntu0.18.04.2-esm4.md) | Oct 9, 2026 |
| Linux | libpng16-16 Ubuntu 20.04 LTS (focal) | 1.6.37-2ubuntu0.1~esm4 | [libpng16-16 1.6.37-2ubuntu0.1~esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpng16-16-1.6.37-2ubuntu0.1-esm4.md) | Oct 9, 2026 |
| Linux | libpng16-16 Ubuntu 22.04.1 LTS (jammy) | 1.6.37-3ubuntu0.7 | [libpng16-16 1.6.37-3ubuntu0.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpng16-16-1.6.37-3ubuntu0.7.md) | Oct 9, 2026 |
| Linux | libpng16-16t64 Ubuntu 24.04.5 LTS (noble) | 1.6.43-5ubuntu0.7 | [libpng16-16t64 1.6.43-5ubuntu0.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libpng16-16t64-1.6.43-5ubuntu0.7.md) | Oct 9, 2026 |
| Linux | libpng16-16t64 Ubuntu 26.04.1 LTS (resolute) | 1.6.57-1ubuntu0.1 | [libpng16-16t64 1.6.57-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libpng16-16t64-1.6.57-1ubuntu0.1.md) | Sep 28, 2026 |

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Data as of 2026-11-08T13:06:02Z 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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