medium5.5
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 h…
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| Libschrift | through 0.10.2 |
Versions were read from the advisory text. No structured product data has been published for this record yet.
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/tomolt/libschrift/blob/v0.10.2/schrift.c#L1422-L1503
- https://github.com/tomolt/libschrift/blob/v0.10.2/schrift.c#L542
- https://github.com/tomolt/libschrift/issues/46
- https://hackmd.io/@haind-pwn/libschrift-unitsperem-zero-oob
- https://www.vulncheck.com/advisories/libschrift-through-0.10.2-divide-by-zero-via-unitsperem-in-draw-line