CVE-2026-110605: Divide By Zero in tomolt libschrift
Description
A divide by zero vulnerability exists in libschrift through version 0.10.2. This flaw allows attackers to crash applications by supplying a crafted TrueType font with unitsPerEm set to 0 in the head table. The vulnerability involves NaN glyph coordinates bypassing clip_points(), leading to an out-of-bounds raster read in draw_line() during sft_render(), which causes the process to crash.
CVSS v4.0
Score 6.8medium
Affected software
tomolt
libschrift
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
libschrift versions up to and including 0.10.2 contain a divide by zero vulnerability triggered by a crafted TrueType font with unitsPerEm of 0 in the font's head table. The crafted font's NaN glyph coordinates bypass the clip_points() function, resulting in an out-of-bounds raster read in draw_line() during the sft_render() function. This leads to a crash of the affected application.
Potential Impact
Successful exploitation causes application crashes due to divide by zero and out-of-bounds memory reads. There is no indication of code execution or privilege escalation. The impact is denial of service (application crash).
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-14T13:07:21.881Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6acf92eb2cdf04f6568a3828
Added to database: 10/14/2026, 14:34:19 UTC
Last enriched: 10/14/2026, 15:18:28 UTC
Last updated: 10/14/2026, 19:00:33 UTC
Views: 9
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.