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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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
https://github.com/tomolt/libschrift/issues/46
https://hackmd.io/@haind-pwn/libschrift-unitsperem-zero-oob

Configurations

No configuration.

History

26 Oct 2026, 17:17

Type	Values Removed	Values Added
References	~~() https://github.com/tomolt/libschrift/issues/46 -~~	() https://github.com/tomolt/libschrift/issues/46 -
References	~~() https://hackmd.io/@haind-pwn/libschrift-unitsperem-zero-oob -~~	() https://hackmd.io/@haind-pwn/libschrift-unitsperem-zero-oob -

14 Oct 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-14 15:17

Updated : 2026-10-26 17:17

NVD link : CVE-2026-110605

Mitre link : CVE-2026-110605

CVE.ORG link : CVE-2026-110605

JSON object : View

Products Affected

No product.

CWE

CWE-369

Divide By Zero

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