CVE-2026-110605libschrift through 0.10.2 Divide by Zero via unitsPerEm in draw_line
Updated under an hour ago ()
Does this affect you?
It affects tomolt libschrift. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 5.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-369
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
tomolt libschrift tomolt:libschrift (from the name) | through 0.10.2 | CNA record |
References
- https://github.com/tomolt/libschrift/issues/46issue-tracking
- https://hackmd.io/@haind-pwn/libschrift-unitsperem-zero-oobthird-party-advisory
- https://github.com/tomolt/libschrift/blob/v0.10.2/schrift.c#L542technical-description
- https://github.com/tomolt/libschrift/blob/v0.10.2/schrift.c#L1422-L1503technical-description
- https://www.vulncheck.com/advisories/libschrift-through-0.10.2-divide-by-zero-via-unitsperem-in-draw-linethird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.