Vulnerability in Tomolt Libschrift
CVE-2026-110605
libschrift through 0.10.2 contains a divide by zero vulnerability that allows attackers to crash applications by supplying a font with unitsPerEm of 0 in the head table. Attackers can provide a crafted TrueType font whose NaN glyph coordinates bypass clip_points(), causing an out-of-bounds raster read in draw_line() during sft_render() and crashing the process.
Published .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/tomolt/libschrift/issues/46 (issue-tracking)
- hackmd.io/@haind-pwn/libschrift-unitsperem-zero-oob (third-party-advisory)
- github.com/tomolt/libschrift/blob/v0.10.2/schrift.c (technical-description)
- github.com/tomolt/libschrift/blob/v0.10.2/schrift.c (technical-description)
- www.vulncheck.com/advisories/libschrift-through-0.10.2-divide-by-zero-via-units… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-110605?
- CVE-2026-110605 is a medium-severity vulnerability in Tomolt Libschrift, classified under Divide By Zero. CVSS score: 5.5/10. Published 2026-10-14.
- How severe is CVE-2026-110605?
- Medium severity. CVSS v3 base score is 5.5 out of 10.