# CVE-2026-22020: libpng: * updated to 1.6.58 * 1.6.58 is released with a fix for a simple correctness bug (not a security issue) this time: pn...

CVE-2026-22020 is fixed in 8 products on 1 platform, first by FEDORA-2026-A109A9AC2C, released May 26, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-22020
- Priority: Routine
- CVSS: n/a (moderate)
- EPSS: n/a
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 26, 2026

## Description

* updated to 1.6.58 * 1.6.58 is released with a fix for a simple correctness bug (not a security issue) this time: png_get_PLTE() returns stale palette data when either gamma correction or alpha-compositing is the only transform applied. Like the issues addressed in the previous release, this bug was a regression introduced in the fix for CVE-2026-33416 in 1.6.56. * 1.6.57 is released with fixes for the following security vulnerability: - CVE-2026-34757 (medium severity): Use-after-free memory bug in the chunk setter API. The hIST variant has existed since version 1.0.9, but the PLTE and tRNS ones are regressions introduced in the fix for CVE-2026-33416 in 1.6.56 (oops).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libpng Fedora 43 | 2:1.6.58-1.fc43 | [FEDORA-2026-A109A9AC2C](https://patchblox.com/security/data/fix/linux/fedora-2026-a109a9ac2c.md) | May 26, 2026 |
| Linux | libpng-debuginfo Fedora 43 | 2:1.6.58-1.fc43 | [FEDORA-2026-A109A9AC2C](https://patchblox.com/security/data/fix/linux/fedora-2026-a109a9ac2c.md) | May 26, 2026 |
| Linux | libpng-debugsource Fedora 43 | 2:1.6.58-1.fc43 | [FEDORA-2026-A109A9AC2C](https://patchblox.com/security/data/fix/linux/fedora-2026-a109a9ac2c.md) | May 26, 2026 |
| Linux | libpng-devel Fedora 43 | 2:1.6.58-1.fc43 | [FEDORA-2026-A109A9AC2C](https://patchblox.com/security/data/fix/linux/fedora-2026-a109a9ac2c.md) | May 26, 2026 |
| Linux | libpng-devel-debuginfo Fedora 43 | 2:1.6.58-1.fc43 | [FEDORA-2026-A109A9AC2C](https://patchblox.com/security/data/fix/linux/fedora-2026-a109a9ac2c.md) | May 26, 2026 |
| Linux | libpng-static Fedora 43 | 2:1.6.58-1.fc43 | [FEDORA-2026-A109A9AC2C](https://patchblox.com/security/data/fix/linux/fedora-2026-a109a9ac2c.md) | May 26, 2026 |
| Linux | libpng-tools Fedora 43 | 2:1.6.58-1.fc43 | [FEDORA-2026-A109A9AC2C](https://patchblox.com/security/data/fix/linux/fedora-2026-a109a9ac2c.md) | May 26, 2026 |
| Linux | libpng-tools-debuginfo Fedora 43 | 2:1.6.58-1.fc43 | [FEDORA-2026-A109A9AC2C](https://patchblox.com/security/data/fix/linux/fedora-2026-a109a9ac2c.md) | May 26, 2026 |

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Data as of 2026-11-10T07:50:38Z 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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