GNU Emacs for Android is vulnerable to an integer overflow in sfnt_read_name_table() in src/sfnt.c. The function computes an allocation size using a 32-bit length value from a TrueType font file with…
Summary
GNU Emacs for Android is vulnerable to an integer overflow in sfnt_read_name_table() in src/sfnt.c. The function computes an allocation size using a 32-bit length value from a TrueType font file without overflow checking. On 32-bit targets, a crafted font causes the calculation to wrap, resulting in an undersized heap allocation. A subsequent read() call writes beyond the buffer, causing a heap buffer overflow. An attacker can deliver a malicious font file via email, EWW (Emacs Web Wowser), or …
In-depth triage · Auto channel
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Lint boundary warnings (3)
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://git.savannah.gnu.org/cgit/emacs.git/commit/?id=d51a4722316efe0960994d371e1859099894d1ca -
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://git.savannah.gnu.org/cgit/emacs.git/commit/?id=d51a4722316efe0960994d371e1859099894d1ca
- https://www.gnu.org/savannah-checkouts/gnu/emacs/emacs.html
Timeline
- nvd_ingest NVD