GNU Emacs for Android improperly validates the table header input in sfnt_read_table_directory() in src/sfnt.c. Due to an incorrect comparison variable in the read-length check, a crafted font file t…
Summary
GNU Emacs for Android improperly validates the table header input in sfnt_read_table_directory() in src/sfnt.c. Due to an incorrect comparison variable in the read-length check, a crafted font file that claims to contain more table directory entries than actually present causes the parser to return a struct with uninitialized heap memory in the table directory entries. An attacker can deliver a malicious font file via email, EWW (Emacs Web Wowser), or documents with custom faces, causing Emacs …
In-depth triage · Auto channel
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Lint boundary warnings (2)
The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).
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REF_URL_NOT_ALLOWLISTEDurl not in allowlist: https://cert.pl/en/posts/2026/08/CVE-2026-71391 -
REF_URL_NOT_ALLOWLISTEDurl not in allowlist: https://www.gnu.org/savannah-checkouts/gnu/emacs/emacs.html
Sources
- NVD DATABASE
Original Links
- https://cert.pl/en/posts/2026/08/CVE-2026-71391
- https://www.gnu.org/savannah-checkouts/gnu/emacs/emacs.html
Timeline
- nvd_ingest NVD