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CVE-2026-3381 PUBLISHED CVSS 7.900000095367432 HIGH

In OCaml before 4.14.3 and 5.x before 5.4.1, a buffer over-read in Marshal deserialization (runtime/intern.c) enables remote code execution through a multi-phase attack chain. The vulnerability stems from missing bounds validation in the readblock() function, which performs unbounded memcpy() operations using attacker-controlled lengths from crafted Marshal data.

EPSS 0.03% · 9.3th percentile

Risk Scores

CVSS v3.1
7.900000095367432
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
EPSS Score
0.03%
9.3th percentile

Affected Products

VendorProductVersions
OCamlOCaml0, 5.0.0, 5.0.0
ocamlocaml0, 5.0.0, 0

Timeline

References

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