CVE catalog

CVE-2026-34353

In OCaml through 4.14.3, Bigarray.reshape allows an integer overflow, and resultant reading of arbitrary memory, when untrusted data is processed.

[CVE catalog]

Severity: Medium · CVSS 5.9CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Published: Mar 27, 2026, 4:55:58 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.12% · Oct 25, 2026

In OCaml through 4.14.3, Bigarray.reshape allows an integer overflow, and resultant reading of arbitrary memory, when untrusted data is processed.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	ocaml	sid	`5.4.1-1`	fixed
Debian	ocaml	forky	`5.4.1-1`	fixed
Debian	ocaml	trixie	`5.3.0-3`	fixed
Debian	ocaml	bookworm	`4.13.1-4`	vulnerable
Cpe	ocaml	Not reported	Not reported	vulnerable
Cpe	ocaml	Not reported	Not reported	unknown
Ubuntu	ocaml	pro	`4.04.0-2ubuntu4`	vulnerable
Ubuntu	ocaml	pro	`4.05.0-10ubuntu1`	vulnerable
Ubuntu	ocaml	pro	`4.05.0-10ubuntu1+esm1`	vulnerable
Ubuntu	ocaml	20.04	`4.05.0-12ubuntu3`	vulnerable
Ubuntu	ocaml	20.04	`4.08.1-8`	vulnerable
Ubuntu	ocaml	22.04	`4.11.1-4`	vulnerable
Ubuntu	ocaml	22.04	`4.11.1-5ubuntu1`	vulnerable
Ubuntu	ocaml	22.04	`4.13.1-3ubuntu1`	vulnerable
Ubuntu	ocaml	24.04	`4.13.1-6ubuntu1`	vulnerable
Ubuntu	ocaml	24.04	`4.14.1-1ubuntu1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	ocaml	source	sid	`5.2.0-1`	not yet assigned	Not reported	Not reported
Debian	ocaml	source	forky	`5.2.0-1`	not yet assigned	Not reported	Not reported
Debian	ocaml	source	trixie	`5.2.0-1`	not yet assigned	Not reported	Not reported
Debian	ocaml	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported

Notes

[bookworm] ocaml: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[ocaml]Affected
Details (2)
- 4.13.1-4 · amd64 · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
- 4.13.1-4 · arm64 · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
[ocaml-base]Affected
Source package: [ocaml]
Details (2)
- 4.13.1-4 · amd64 · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
- 4.13.1-4 · arm64 · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
[ocaml-base-nox]Affected
Source package: [ocaml]
Details (2)
- 4.13.1-4 · all · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
- 4.13.1-4 · all · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
[ocaml-compiler-libs]Affected
Source package: [ocaml]
Details (2)
- 4.13.1-4 · amd64 · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
- 4.13.1-4 · arm64 · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
[ocaml-interp]Affected
Source package: [ocaml]
Details (2)
- 4.13.1-4 · amd64 · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
- 4.13.1-4 · arm64 · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
[ocaml-man]Affected
Source package: [ocaml]
Details (2)
- 4.13.1-4 · all · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
- 4.13.1-4 · all · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
[ocaml-nox]Affected
Source package: [ocaml]
Details (2)
- 4.13.1-4 · all · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
- 4.13.1-4 · all · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
[ocaml-source]Affected
Source package: [ocaml]
Details (2)
- 4.13.1-4 · all · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12
- 4.13.1-4 · all · bookworm
  Affected
  nvd · ocaml · debian · bookworm; nvd · ocaml · debian · 12

[Debian 13 (Trixie)]

[libcompiler-libs-ocaml-dev]Fixed
Source package: [ocaml]
Details (2)
- 5.3.0-3 · amd64 · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
- 5.3.0-3 · arm64 · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
[libstdlib-ocaml]Fixed
Source package: [ocaml]
Details (2)
- 5.3.0-3 · amd64 · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
- 5.3.0-3 · arm64 · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
[libstdlib-ocaml-dev]Fixed
Source package: [ocaml]
Details (2)
- 5.3.0-3 · amd64 · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
- 5.3.0-3 · arm64 · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
[ocaml]Fixed
Details (2)
- 5.3.0-3 · amd64 · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
- 5.3.0-3 · arm64 · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
[ocaml-base]Fixed
Source package: [ocaml]
Details (2)
- 5.3.0-3 · amd64 · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
- 5.3.0-3 · arm64 · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
[ocaml-base-nox]Fixed
Source package: [ocaml]
Details (2)
- 5.3.0-3 · all · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
- 5.3.0-3 · all · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
[ocaml-compiler-libs]Fixed
Source package: [ocaml]
Details (2)
- 5.3.0-3 · all · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
- 5.3.0-3 · all · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
[ocaml-interp]Fixed
Source package: [ocaml]
Details (2)
- 5.3.0-3 · amd64 · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
- 5.3.0-3 · arm64 · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
[ocaml-man]Fixed
Source package: [ocaml]
Details (2)
- 5.3.0-3 · all · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
- 5.3.0-3 · all · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
[ocaml-nox]Fixed
Source package: [ocaml]
Details (2)
- 5.3.0-3 · all · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
- 5.3.0-3 · all · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
[ocaml-source]Fixed
Source package: [ocaml]
Details (2)
- 5.3.0-3 · all · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13
- 5.3.0-3 · all · trixie
  Fixed · Fixed: 5.2.0-1
  nvd · ocaml · debian · 13

Observed: Oct 23, 2026, 10:36:27 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]