# CVE-2026-25556: mupdf: MuPDF versions 1.23.0 through 1.27.0 contain a double-free vulnerability in fz_fill_pixmap_from_display_list() when a...

CVE-2026-25556 is fixed in mupdf on 1 platform, first by DEBIAN-CVE-2026-25556, released February 6, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-25556
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0053
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 6, 2026

## Description

MuPDF versions 1.23.0 through 1.27.0 contain a double-free vulnerability in fz_fill_pixmap_from_display_list() when an exception occurs during display list rendering. The function accepts a caller-owned fz_pixmap pointer but incorrectly drops the pixmap in its error handling path before rethrowing the exception. Callers (including the barcode decoding path in fz_decode_barcode_from_display_list) also drop the same pixmap in cleanup, resulting in a double-free that can corrupt the heap and crash the process. This issue affects applications that enable and use MuPDF barcode decoding and can be triggered by processing crafted input that causes a rendering-time error while decoding barcodes.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | mupdf Debian 14 | 1.27.0+ds1-3 | [DEBIAN-CVE-2026-25556](https://patchblox.com/security/data/fix/linux/debian-cve-2026-25556.md) | Feb 6, 2026 |
| Linux | mupdf opensuse-leap 16.0 | 1.27.2-bp160.1.1 | [OPENSUSE-SU-2026:21180-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21180-1.md) | Jun 30, 2026 |

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Data as of 2026-11-09T01:18:40Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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