# CVE-2018-9838: ocaml: The caml_ba_deserialize function in byterun/bigarray.c in the standard library in OCaml 4.06.0 has an integer overflo...

CVE-2018-9838 is fixed in 8 products on 1 platform, first by ocaml 4.05.0-10ubuntu1+esm1, released April 6, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-9838
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0417
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 6, 2018

## Description

The caml_ba_deserialize function in byterun/bigarray.c in the standard library in OCaml 4.06.0 has an integer overflow which, in situations where marshalled data is accepted from an untrusted source, allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via a crafted object.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ocaml Ubuntu 18.04.6 LTS (bionic) | 4.05.0-10ubuntu1+esm1 | [ocaml 4.05.0-10ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ocaml-4.05.0-10ubuntu1-esm1.md) | Apr 6, 2018 |
| Linux | ocaml-base Ubuntu 18.04.6 LTS (bionic) | 4.05.0-10ubuntu1+esm1 | [ocaml-base 4.05.0-10ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ocaml-base-4.05.0-10ubuntu1-esm1.md) | Apr 6, 2018 |
| Linux | ocaml-base-nox Ubuntu 18.04.6 LTS (bionic) | 4.05.0-10ubuntu1+esm1 | [ocaml-base-nox 4.05.0-10ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ocaml-base-nox-4.05.0-10ubuntu1-esm1.md) | Apr 6, 2018 |
| Linux | ocaml-compiler-libs Ubuntu 18.04.6 LTS (bionic) | 4.05.0-10ubuntu1+esm1 | [ocaml-compiler-libs 4.05.0-10ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ocaml-compiler-libs-4.05.0-10ubuntu1-esm1.md) | Apr 6, 2018 |
| Linux | ocaml-interp Ubuntu 18.04.6 LTS (bionic) | 4.05.0-10ubuntu1+esm1 | [ocaml-interp 4.05.0-10ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ocaml-interp-4.05.0-10ubuntu1-esm1.md) | Apr 6, 2018 |
| Linux | ocaml-mode Ubuntu 18.04.6 LTS (bionic) | 4.05.0-10ubuntu1+esm1 | [ocaml-mode 4.05.0-10ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ocaml-mode-4.05.0-10ubuntu1-esm1.md) | Apr 6, 2018 |
| Linux | ocaml-nox Ubuntu 18.04.6 LTS (bionic) | 4.05.0-10ubuntu1+esm1 | [ocaml-nox 4.05.0-10ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ocaml-nox-4.05.0-10ubuntu1-esm1.md) | Apr 6, 2018 |
| Linux | ocaml-source Ubuntu 18.04.6 LTS (bionic) | 4.05.0-10ubuntu1+esm1 | [ocaml-source 4.05.0-10ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ocaml-source-4.05.0-10ubuntu1-esm1.md) | Apr 6, 2018 |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo