# CVE-2026-63729: texlive-bin: The SyncTeX parser (synctex_parser.c) shipped with TeX Live and embedded by downstream consumers such as GNOME Evince...

CVE-2026-63729 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-63729, released July 22, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-63729
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 21, 2026

## Description

The SyncTeX parser (synctex_parser.c) shipped with TeX Live and embedded by downstream consumers such as GNOME Evince contains a heap use-after-free vulnerability that allows attackers to crash applications or potentially execute arbitrary code by supplying a malformed .synctex or .synctex.gz file. A malformed SyncTeX file can construct a ref node with a NULL parent pointer, causing the replacement routine to fail to detach the node from its sibling chain, which triggers recursive freeing of live tree nodes and leaves dangling pointers that are later accessed by the parser during document load.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | evince sles 15.7 | 45.0-150600.3.6.1 | [SUSE-SU-2026:3512-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3512-1.md) | Aug 5, 2026 |
| Linux | texlive sles 15.7 | 2021.20210325-150600.38.3.1 | [SUSE-SU-2026:3628-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3628-1.md) | Aug 17, 2026 |
| Linux | texlive-bin Debian 14 | 2026.20260303.78225+ds-2 | [DEBIAN-CVE-2026-63729](https://patchblox.com/security/data/fix/linux/debian-cve-2026-63729.md) | Jul 22, 2026 |
| Linux | texstudio Debian 14 | 4.9.6+ds-1 | [DEBIAN-CVE-2026-63729](https://patchblox.com/security/data/fix/linux/debian-cve-2026-63729.md) | Jul 22, 2026 |

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Data as of 2026-11-09T19:38:12Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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