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CVE-2026-28364

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CVE-2026-28364

Published: Feb 27, 2026

Modified: Feb 27, 2026

PUBLISHED

CVSS v3.1

7.9

HIGH

Description

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.

VendorProductVersions

OCaml

OCaml

affected
0 - < 4.14.3
affected
5.0.0 - < 5.4.1

Weaknesses (CWE)

CWE-126

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

Low

Availability

None

References

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