CVEvulnerability
CVE-2026-110605
6.8 MEDIUM
Official page ↗
- Status
- Deferred
- Published
- 2026-10-14
- Last modified
- 2026-10-26
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 6.8 MEDIUM — CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-369
Description
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.
Related
Weakness · CWE (1)
- CWE-369 Divide By Zero weakness
References
- https://github.com/tomolt/libschrift/blob/v0.10.2/schrift.c#L1422-L1503 github.com
- https://github.com/tomolt/libschrift/blob/v0.10.2/schrift.c#L542 github.com
- https://github.com/tomolt/libschrift/issues/46 github.com
- https://hackmd.io/@haind-pwn/libschrift-unitsperem-zero-oob hackmd.io
- https://www.vulncheck.com/advisories/libschrift-through-0.10.2-divide-by-zero-via-unitsperem-in-draw-line www.vulncheck.com
- https://github.com/tomolt/libschrift/issues/46 github.com
- https://hackmd.io/@haind-pwn/libschrift-unitsperem-zero-oob hackmd.io