CVE catalog
CVE-2026-71393
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 witho
- Severity
- High · CVSS 7.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.67% · Oct 25, 2026
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 documents with custom faces, causing Emacs to load it. This can lead to heap memory corruption and potential code execution. This issue was fixed in commit d51a4722316efe0960994d371e1859099894d1ca
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | emacs | sid | 1:30.2+1-11 | not affected |
| Debian | emacs | forky | 1:30.2+1-11 | not affected |
| Debian | emacs | trixie | 1:30.1+1-6+deb13u1 | not affected |
| Debian | emacs | trixie-security | 1:30.1+1-6+deb13u1 | not affected |
| Debian | emacs | bookworm | 1:28.2+1-15+deb12u4 | not affected |
| Debian | emacs | bookworm-security | 1:28.2+1-15+deb12u4 | not affected |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | emacs | source | sid | Not affected | unimportant | Not reported | Not reported |
| Debian | emacs | source | forky | Not affected | unimportant | Not reported | Not reported |
| Debian | emacs | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | emacs | source | bookworm | Not affected | unimportant | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [emacs]Not affected
Details (6)
1:28.2+1-15+deb12u4· all · bookwormNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· all · bookwormNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· all · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· all · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· all · bookworm-securityNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· all · bookworm-securityNot affected
nvd · emacs · debian · bookworm
- [emacs-bin-common]Not affected
Source package: [emacs]
Details (6)
1:28.2+1-15+deb12u4· amd64 · bookwormNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· arm64 · bookwormNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· amd64 · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· arm64 · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· amd64 · bookworm-securityNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· arm64 · bookworm-securityNot affected
nvd · emacs · debian · bookworm
- [emacs-common]Not affected
Source package: [emacs]
Details (6)
1:28.2+1-15+deb12u4· all · bookwormNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· all · bookwormNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· all · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· all · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· all · bookworm-securityNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· all · bookworm-securityNot affected
nvd · emacs · debian · bookworm
- [emacs-el]Not affected
Source package: [emacs]
Details (6)
1:28.2+1-15+deb12u4· all · bookwormNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· all · bookwormNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· all · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· all · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· all · bookworm-securityNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· all · bookworm-securityNot affected
nvd · emacs · debian · bookworm
- [emacs-gtk]Not affected
Source package: [emacs]
Details (6)
1:28.2+1-15+deb12u4· amd64 · bookwormNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· arm64 · bookwormNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· amd64 · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· arm64 · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· amd64 · bookworm-securityNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· arm64 · bookworm-securityNot affected
nvd · emacs · debian · bookworm
- [emacs-lucid]Not affected
Source package: [emacs]
Details (6)
1:28.2+1-15+deb12u4· amd64 · bookwormNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· arm64 · bookwormNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· amd64 · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· arm64 · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· amd64 · bookworm-securityNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· arm64 · bookworm-securityNot affected
nvd · emacs · debian · bookworm
- [emacs-nox]Not affected
Source package: [emacs]
Details (6)
1:28.2+1-15+deb12u4· amd64 · bookwormNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· arm64 · bookwormNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· amd64 · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· arm64 · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· amd64 · bookworm-securityNot affected
nvd · emacs · debian · bookworm
1:28.2+1-15+deb12u4· arm64 · bookworm-securityNot affected
nvd · emacs · debian · bookworm
- [emacs-pgtk]Not affected
Source package: [emacs]
Details (2)
1:30.1+1-6~bpo12+1· amd64 · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
1:30.1+1-6~bpo12+1· arm64 · bookworm-backportsNot affected
nvd · emacs · debian · bookworm
Observed:
References
- [https://cert.pl/en/posts/2026/08/CVE-2026-71391]
- [https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=d51a4722316efe0960994d371e1859099894d1ca]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-71393]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-71393]
- [https://security-tracker.debian.org/tracker/CVE-2026-71393]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-71393.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2721.json]
- [https://www.gnu.org/savannah-checkouts/gnu/emacs/emacs.html]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]