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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.
| Reporter | Title | Published | Views | Family All 42 |
|---|---|---|---|---|
 | CVE-2026-28364 | 27 Feb 202603:54 | – | attackerkb |
 | Amazon Linux 2023 : ocaml, ocaml-compiler-libs, ocaml-ocamldoc (ALAS2023-2026-1479) | 30 Mar 202600:00 | – | nessus |
| openSUSE 16 Security Update : ocaml (openSUSE-SU-2026:20368-1) | 19 Mar 202600:00 | – | nessus |
| SUSE SLES15 Security Update : ocaml (SUSE-SU-2026:0800-1) | 6 Mar 202600:00 | – | nessus |
| SUSE SLED15 / SLES15 / openSUSE 15 Security Update : ocaml (SUSE-SU-2026:0830-1) | 6 Mar 202600:00 | – | nessus |
| TencentOS Server 4: ocaml (TSSA-2026:0175) | 24 Mar 202600:00 | – | nessus |
| Linux Distros Unpatched Vulnerability : CVE-2026-28364 | 2 Mar 202600:00 | – | nessus |
 | Important: ocaml | 27 Mar 202600:00 | – | amazon |
 | CVE-2026-28364 | 27 Feb 202603:54 | – | alpinelinux |
 | CVE-2026-28364 affecting package ocaml for versions less than 5.1.1-2 | 11 Mar 202622:44 | – | cbl_mariner |
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11 Mar 2026 21:35Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.8 - 7.9
EPSS0.00051
SSVC