high7.9
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-pha…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Ocaml | Ocaml | before 4.14.3 from 5.0.0 before 5.4.1 |
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/ocaml/security-advisories/blob/generated-osv/2026/OSEC-2026-01.json
- https://osv.dev/vulnerability/OSEC-2026-01
- https://access.redhat.com/security/cve/CVE-2026-28364
- https://bugzilla.redhat.com/show_bug.cgi?id=2443348
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28364.json