TI-2026-26640 Aliases CVE-2026-34353 GHSA-6p45-jv22-32gp

Integer overflow in OCaml

LOW 25CWE-190Published 2026-03-27 · Updated 2026-03-27

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: High · None · None
Fix status: Deferred Red Hat: fix deferred

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00116 1st percentileScored 2026-11-07

Fix Deferred Red Hat: fix deferred

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
OCaml	OCaml	up to 4.14.3	—	No fix listed	CNA

OCaml VendorOCaml Affected up to 4.14.3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:ocaml:ocaml::::::::	up to 4.14.3	Vulnerable	OCaml

cpe:2.3:a:ocaml:ocaml:*:*:*:*:*:*:*:* Versions up to 4.14.3 Vulnerable ·OCaml

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 6	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 7	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-34353
2026-10-03 Alias added: GHSA-6p45-jv22-32gp

References

Other 2

TI-2018-07003 The caml_ba_deserialize function in byterun/bigarray.c in the standard library in OCaml… CVSS 3.0CRITICAL 9.8
TI-2017-07154 Insufficient sanitisation in the OCaml compiler versions 4.04.0 and 4.04.1 allows… CVSS 3.0CRITICAL 9.8
TI-2015-07299 OCaml before 4.03.0 does not properly handle sign extensions, which allows remote… CVSS 3.0CRITICAL 9.1
TI-2017-07160 OCaml compiler allows attackers to have unspecified impact via unknown vectors, a similar… CVSS 3.0HIGH 7.8
TI-2026-22643 In OCaml before 4.14.3 and 5.x before 5.4.1, a buffer over-read in Marshal… CVSS 3.1HIGH 7.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences