CVE WatchJul 21, 2026

CVE-2026-63729

The SyncTeX parser (synctex_parser.c) shipped with TeX Live and embedded by downstream consumers such as GNOME Evince contains a heap use-af

CVSS

6.6

Medium

EPSS

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KEV

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Exploit Today

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0-100

Published: Jul 21, 2026 · Last modified: Jul 21, 2026 · CWE-416

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

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