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OSEC-2026-04
No affected components available
The function caml_ba_reshape, part of the OCaml runtime (in runtime/bigarray.c), had a missing check for integer overflow when computing the size to be allocated. This leads to a segmentation fault.
Any application using Bigarray.reshape (or reshape_N) with untrusted and unchecked input can result in a segmentation fault.
Timeline
- 2026-06-18 security advisory released
- 2026-06-15 OCaml 4.14.4 released
- 2026-04-16 Florian Angeletti backported the fix to the 4.14 branch
- 2026-04-15 Stephen Dolan proposed fix https://github.com/ocaml/ocaml/pull/14691
- 2026-03-18 Andriy Sultanov reported https://github.com/ocaml/ocaml/issues/14655
The vulnerability requires local access to the device to be exploited. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a low impact on the integrity of the data.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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