EIP-2026-103509

PRE-CVE

Graphite2 - TtfUtil::CheckCmapSubtable12 Heap Overread

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-103509. PoCs published by Google Security Research.

AI-analyzed exploit summary This exploit demonstrates a heap-based buffer overread in Graphite2's gr2FontTest utility, triggered by a malformed font file. The vulnerability occurs in the `CheckCmapSubtable12` function, leading to a crash due to an out-of-bounds memory read.

Description

Graphite2 - TtfUtil::CheckCmapSubtable12 Heap Overread

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · textdosmultiple
https://www.exploit-db.com/exploits/39861

This exploit demonstrates a heap-based buffer overread in Graphite2's gr2FontTest utility, triggered by a malformed font file. The vulnerability occurs in the `CheckCmapSubtable12` function, leading to a crash due to an out-of-bounds memory read.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Graphite2 (git trunk)
No auth needed
Prerequisites: A malformed font file · Access to the gr2FontTest utility
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026