CVE-2026-28364: 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.
Overview
- Severity
- High (CVSS 7.9)
- CVSS Vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
- Exploit Status
- Not Exploited
- Patch Tuesday
- 2026-Feb
- Released
- 2026-02-28
- EPSS Score
- 0.04% (percentile: 11.4%)
Affected Products (1)
Other
Revision History
- 2026-02-28: Information published.