CVE-2026-71392

Integer Overflow in GNU Emacs for Android

Published: Aug 10, 2026Updated: Aug 28, 2026 Sources: CVE List NVDCWE-190

N/ACVSS

NVD MITRE

Description

GNU Emacs for Android is vulnerable to an integer overflow in the sfnt_read_cmap_format_12() function in src/sfnt.c. When processing a crafted TrueType font file, an unguarded addition in the xmalloc allocation call wraps around on 32-bit builds, causing a heap buffer overflow write. An attacker can deliver a malicious font file via email, EWW (Emacs Web Wowser), or documents with custom faces, causing Emacs to load it. This results in heap memory corruption that can lead to code execution. This issue was fixed in commit c4e20777c26548722a37b03db93243e83a0d6188

No summary for this CVE yet.

Weaknesses

CWE-190

Affected Products

GNU

oss-project·USaka g. nu

Emacs

OSS Libraries

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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References

https://cert.pl/en/posts/2026/08/CVE-2026-71391

cert.pl

https://www.gnu.org/savannah-checkouts/gnu/emacs/emacs.html

gnu.org

https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=c4e20777c26548722a37b03db93243e83a0d6188

git.savannah.gnu.org

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